diff --git a/Big Countries b/Big Countries
new file mode 100644
index 0000000..15d31c7
--- /dev/null
+++ b/Big Countries	
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+import pandas as pd
+
+def big_countries(world: pd.DataFrame) -> pd.DataFrame:
+    df = world[(world['area']>=3000000) | (world['population']>=25000000)]
+    return df[['name','population','area']]
diff --git a/Customers Who Never Order b/Customers Who Never Order
new file mode 100644
index 0000000..4d47648
--- /dev/null
+++ b/Customers Who Never Order	
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+import pandas as pd
+
+def find_customers(customers: pd.DataFrame, orders: pd.DataFrame) -> pd.DataFrame:
+    #df = customers[~customers['id'].isin(orders['customerId'])]
+    #return df[['name']].rename(columns={'name':'Customers'})
+    df = customers.merge(orders, left_on="id", right_on ="customerId", how="left")
+    df = df[df["customerId"].isna()]
+    return df[['name']].rename(columns={'name':'Customers'})
diff --git a/Dataframe from a 2-D list b/Dataframe from a 2-D list
new file mode 100644
index 0000000..85fa7c1
--- /dev/null
+++ b/Dataframe from a 2-D list	
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+# import pandas as pd 
+import pandas as pd  
+    
+# List1  
+lst = [['This is', 1], ['a', 2], ['learning', 3], ['program', 4]] 
+
+# creating df object  
+df = pd.DataFrame(lst, columns =['Tag', 'number']) 
+print(df )
diff --git a/Recyclable and Low Fat Products b/Recyclable and Low Fat Products
new file mode 100644
index 0000000..fda9abd
--- /dev/null
+++ b/Recyclable and Low Fat Products	
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+import pandas as pd
+
+def find_products(products: pd.DataFrame) -> pd.DataFrame:
+    df = products[(products['low_fats'] =='Y') & (products['recyclable']== 'Y')]
+    return df[['product_id']]