diff --git a/kadai3.rb b/kadai3.rb
index 1a5fd6f..911bd2e 100644
--- a/kadai3.rb
+++ b/kadai3.rb
@@ -4,15 +4,20 @@ class Menu
   
   # get_total_priceメソッドを定義してください
   
-  
-  
-  
+  def get_total_price(count)
+    total_price = self.price * count
+    if (count > 3)
+      total_price = self.price * count - 10000
+    end
+    
     return "#{self.name} #{total_price}vnd"
   end
+  
 end
 
 menu1 = Menu.new
 menu1.name = "Phở"
 menu1.price = 30000
 
+puts menu1.get_total_price(5)
 # menu1に対してget_total_priceメソッドを呼び出してください
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diff --git a/kadai4.rb b/kadai4.rb
index 3812441..8e9c786 100644
--- a/kadai4.rb
+++ b/kadai4.rb
@@ -13,11 +13,14 @@ def info
 end
 
 #メニューの変数を定義してください
-menu1 = 
-menu2 = 
-menu3 = 
+menu1 = Menu.new(name: "Phở", price: 30000)
+menu2 = Menu.new(name: "Bún chả", price: 20000)
+menu3 = Menu.new(name: "Bánh mì", price: 10000)
 
 # 変数menusを定義して配列を代入してください
+menus = [menu1, menu2, menu3]
 
-
-# menusに対して繰り返し処理を実行してください
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+# menusに対して繰り返し処理を実行してください
+menus.each do |m|
+  puts m.info
+end
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diff --git a/kadai5.rb b/kadai5.rb
index bc6d258..c4b86db 100644
--- a/kadai5.rb
+++ b/kadai5.rb
@@ -16,6 +16,10 @@ class Drink < Menu
   attr_accessor :size
   
   # initializeメソッドをオーバーライドする
+  def initialize(name:, price:, size:)
+    super(name: name, price: price)
+    self.size = size
+  end
   # nameとpriceはsuperとする
   
   def info
@@ -25,13 +29,15 @@ def info
 
 menu1 = Menu.new(name: "Phở", price: 30000)
 menu2 = Menu.new(name: "Bún chả", price: 40000)
-menu3 = Menu.new(name: "bánh mì", price: 20000)
+menu3 = Menu.new(name: "Bánh mì", price: 20000)
 
 # Drinkの変数を定義してください
+drink1 = Drink.new(name: "Tra", price: 5000, size: "S")
+drink2 = Drink.new(name: "Tra", price: 10000, size: "M")
 
 
 # 変数menusを定義して配列を代入してください
-
+menus = [menu1, menu2, menu3, drink1, drink2]
 
 menus.each do |menu|
   puts "#{menu.info}"
diff --git a/kadai6.rb b/kadai6.rb
new file mode 100644
index 0000000..f7e30bf
--- /dev/null
+++ b/kadai6.rb
@@ -0,0 +1,64 @@
+class Menu
+  attr_accessor :name
+  attr_accessor :price
+  
+  def initialize(name:, price:)
+    self.name = name
+    self.price = price
+  end
+  
+  def info
+    return "#{self.name} #{self.price}vnd"
+  end
+  
+  #Only get name
+  def get_specs
+    return "#{self.name}"
+  end
+  
+end
+
+class Drink < Menu
+  attr_accessor :size
+  
+  # initializeメソッドをオーバーライドする
+  def initialize(name:, price:, size:)
+    super(name: name, price: price)
+    self.size = size
+  end
+  # nameとpriceはsuperとする
+  
+  def info
+    return "#{self.name} #{self.price}vnd (#{self.size}サイズ)"
+  end
+  
+  #Get name and size
+  def get_specs
+    return "#{self.name} (#{self.size}サイズ)"
+  end
+  
+end
+
+menu1 = Menu.new(name: "Phở", price: 30000)
+menu2 = Menu.new(name: "Bún chả", price: 40000)
+menu3 = Menu.new(name: "Bánh mì", price: 20000)
+
+# Drinkの変数を定義してください
+drink1 = Drink.new(name: "Tra", price: 5000, size: "S")
+drink2 = Drink.new(name: "Tra", price: 10000, size: "M")
+
+
+# 変数menusを定義して配列を代入してください
+menus = [menu1, menu2, menu3, drink1, drink2]
+
+index = 0
+menus.each do |menu|
+  puts "#{index}. #{menu.info}"
+  index = index + 1
+end
+
+puts "メニューの番号を選んでください"
+selected_menu = gets.to_i
+
+puts "選択されたメニュー：#{menus[selected_menu].get_specs}"
+puts "お会計は：#{menus[selected_menu].price}vndです"
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