diff --git a/week-1/9-git-branch/styles.css b/week-1/9-git-branch/styles.css
index 0051cdbaf..bc4104b39 100644
--- a/week-1/9-git-branch/styles.css
+++ b/week-1/9-git-branch/styles.css
@@ -1,6 +1,6 @@
 /* Add your own CSS code below */
 .link {
-  color: #4491db;
+  color: green;
   font-weight: 700;
   text-decoration: none;
 }
diff --git a/week-2/10-media-queries/columns.css b/week-2/10-media-queries/columns.css
index 43e80d23c..cca8db89a 100644
--- a/week-2/10-media-queries/columns.css
+++ b/week-2/10-media-queries/columns.css
@@ -1 +1,12 @@
 /* Add your own CSS code below */
+@media (min-width: 768px) {
+  .countries {
+    columns: 2;
+  }
+}
+
+@media (min-width: 1200px) {
+  .countries {
+    columns: 3;
+  }
+}
diff --git a/week-2/11-flexbox/flexbox.css b/week-2/11-flexbox/flexbox.css
index 43e80d23c..e79b78daf 100644
--- a/week-2/11-flexbox/flexbox.css
+++ b/week-2/11-flexbox/flexbox.css
@@ -1 +1,10 @@
 /* Add your own CSS code below */
+.countries.countries--first {
+  display: flex;
+  flex-direction: row-reverse;
+}
+
+.countries.countries--third {
+  display: flex;
+  flex-direction: column-reverse;
+}
diff --git a/week-2/12-justify-content/flexbox.css b/week-2/12-justify-content/flexbox.css
index 3c4c7ff18..dce94e2b1 100644
--- a/week-2/12-justify-content/flexbox.css
+++ b/week-2/12-justify-content/flexbox.css
@@ -7,3 +7,18 @@
 }
 
 /* Add your own CSS code below */
+.countries--first {
+  justify-content: center;
+  padding: auto;
+}
+.countries--second {
+  justify-content: space-evenly;
+}
+.countries--third {
+  justify-content: end;
+  flex-direction: column;
+}
+.countries--fourth {
+  flex-direction: column;
+  justify-content: space-evenly;
+}
diff --git a/week-2/13-align-items/flexbox.css b/week-2/13-align-items/flexbox.css
index 3675a0df3..9e390ec31 100644
--- a/week-2/13-align-items/flexbox.css
+++ b/week-2/13-align-items/flexbox.css
@@ -2,3 +2,21 @@
   display: flex;
 }
 /* Add your own CSS code below */
+.countries--first {
+  align-items: center;
+  justify-content: center;
+}
+.countries--second {
+  flex-direction: row-reverse;
+  justify-content: end;
+  align-items: flex-end;
+}
+.countries--third {
+  flex-direction: column;
+  align-items: flex-end;
+}
+.countries--fourth {
+  flex-direction: column-reverse;
+  justify-content: end;
+  align-items: center;
+}
diff --git a/week-2/14-order/flexbox.css b/week-2/14-order/flexbox.css
index ed621b793..c59f7c3a5 100644
--- a/week-2/14-order/flexbox.css
+++ b/week-2/14-order/flexbox.css
@@ -3,3 +3,25 @@
 }
 
 /* Add your own CSS code below */
+.countries--first > .country--brazil {
+  order: 5;
+}
+.countries--second > .country--brazil {
+  order: 4;
+}
+
+.countries--second > .country--uganda {
+  order: 5;
+}
+.countries--third > .country--brazil {
+  order: 5;
+}
+.countries--third > .country--croatia {
+  order: 4;
+}
+.countries--third > .country--ethiopia {
+  order: 3;
+}
+.countries--third > .country--laos {
+  order: 2;
+}
diff --git a/week-2/15-align-self/flexbox.css b/week-2/15-align-self/flexbox.css
index ed621b793..f52097a9f 100644
--- a/week-2/15-align-self/flexbox.css
+++ b/week-2/15-align-self/flexbox.css
@@ -3,3 +3,35 @@
 }
 
 /* Add your own CSS code below */
+
+.countries--first > .country--ethiopia {
+  align-items: baseline;
+  align-self: flex-end;
+}
+
+.countries--second {
+  align-items: center;
+  align-self: flex-end;
+}
+.countries--second > .country--ethiopia {
+  align-items: baseline;
+  align-self: flex-end;
+}
+
+.countries--third {
+  align-items: flex-end;
+  align-self: flex-end;
+}
+.countries--third > .country--brazil {
+  align-self: flex-start;
+}
+.countries--third > .country--uganda {
+  align-self: flex-start;
+}
+.countries--fourth {
+  flex-direction: column;
+  align-items: flex-start;
+}
+.countries--fourth > .country--uganda {
+  align-self: center;
+}
diff --git a/week-2/16-more-flexbox/flexbox.css b/week-2/16-more-flexbox/flexbox.css
index ed621b793..e1d6b7cd1 100644
--- a/week-2/16-more-flexbox/flexbox.css
+++ b/week-2/16-more-flexbox/flexbox.css
@@ -3,3 +3,43 @@
 }
 
 /* Add your own CSS code below */
+.countries--first {
+  align-items: flex-end;
+  justify-content: end;
+}
+.countries--second {
+  align-items: flex-end;
+  justify-content: center;
+}
+.countries--third {
+  align-items: flex-start;
+  justify-content: center;
+}
+.countries--third > .country--brazil {
+  align-self: flex-end;
+}
+.countries--fourth {
+  flex-direction: column;
+  align-items: flex-end;
+  justify-content: center;
+}
+.countries--fourth > .country--ethiopia {
+  align-self: center;
+}
+.countries--fourth > .country--laos {
+  align-self: center;
+}
+
+.countries--fifth {
+  flex-direction: column-reverse;
+  justify-content: space-between;
+  align-items: flex-end;
+}
+
+.countries--fifth > .country--laos {
+  order: 4;
+}
+
+.countries--fifth > .country--uganda {
+  align-self: center;
+}
diff --git a/week-2/17-nav-menu/styles.css b/week-2/17-nav-menu/styles.css
index f04f4c7ba..74ae94d88 100644
--- a/week-2/17-nav-menu/styles.css
+++ b/week-2/17-nav-menu/styles.css
@@ -1 +1,18 @@
 /* Write your media queries and flexbox CSS below */
+@media (min-width: 480px) {
+  .site-header__nav {
+    display: flex;
+    flex-direction: row;
+  }
+}
+@media (min-width: 700px) {
+  .site-header {
+    display: flex;
+  }
+}
+@media (min-width: 992px) {
+  .site-header {
+    display: flex;
+    justify-content: space-between;
+  }
+}