diff --git a/rideshare.rb b/rideshare.rb
new file mode 100644
index 0000000..21579d0
--- /dev/null
+++ b/rideshare.rb
@@ -0,0 +1,149 @@
+# Ga-Young Jin, Cohort 12
+# Wednesday, August 7th, 2019
+# Week 1
+
+rideshare_data = [
+  [
+    { driver: "DR0001",
+      date: "3rd Feb 2016", 
+      cost: 10, 
+      rider: "RD0003", 
+      rating: 3
+    },
+    { driver: "DR0001",
+      date: "3rd Feb 2016", 
+      cost: 30, 
+      rider: "RD0015", 
+      rating: 4
+    },
+    { driver: "DR0001",
+      date: "5th Feb 2016", 
+      cost: 45, 
+      rider: "RD0003", 
+      rating: 2
+    }
+  ],
+  [
+    { driver: "DR0002",
+      date: "3rd Feb 2016", 
+      cost: 25, 
+      rider: "RD0073", 
+      rating: 5
+    },
+    { driver: "DR0002",
+      date: "4th Feb 2016", 
+      cost: 15, 
+      rider: "RD0013", 
+      rating: 1
+    },
+    { driver: "DR0002",
+      date: "5th Feb 2016", 
+      cost: 35, 
+      rider: "RD0066", 
+      rating: 3
+    },
+  ],
+  [
+    { driver: "DR0003",
+      date: "4th Feb 2016", 
+      cost: 5, 
+      rider: "RD0066", 
+      rating: 5
+    },
+    { driver: "DR0003",
+      date: "5th Feb 2016", 
+      cost: 50, 
+      rider: "RD0003", 
+      rating: 2
+    }
+  ],
+  [
+    { driver: "DR0004",
+      date: "3rd Feb 2016", 
+      cost: 5, 
+      rider: "RD0022", 
+      rating: 5
+    },
+    { driver: "DR0004",
+      date: "4th Feb 2016", 
+      cost: 10, 
+      rider: "RD0022", 
+      rating: 4
+    },
+    { driver: "DR0004",
+      date: "5th Feb 2016", 
+      cost: 20, 
+      rider: "RD0073", 
+      rating: 5
+    }
+  ]
+]
+
+# number of drives each driver has given 
+puts "Number of drives each driver has given:"
+rideshare_data.each do |drives|
+  puts "#{drives[0][:driver]}: #{drives.length}"
+end
+
+# total amount of money each driver has made
+puts "Total amount of money each driver made:"
+rideshare_data.each do |drives|
+  total_money = 0
+  drives.each do |price|
+    total_money = total_money + price[:cost]
+  end
+  puts "#{drives[0][:driver]}: #{total_money}"
+end
+
+# average rating for each driver 
+puts "The average rating for each driver:"
+rideshare_data.each do |drives|
+  total_rating = 0
+  drives.each do |ride|
+    total_rating = total_rating + ride[:rating]
+  end
+  avg_rating = total_rating / drives.length.to_f
+  puts "#{drives[0][:driver]}: #{sprintf('%.2f', avg_rating)}"
+end
+
+# driver that made the most money 
+most_money_driver = ""
+money_made_array = Array.new
+rideshare_data.each do |drives|
+  money_made = 0
+  drives.each do |ride|
+    money_made = money_made + ride[:cost]
+  end
+  money_made_array << money_made
+end 
+most_money = 0
+money_made_array.each do |total|
+  if total > most_money
+    most_money_driver = rideshare_data[0][0][:driver]
+  end
+end
+
+puts "The driver that made the most money: #{most_money_driver}."
+
+# driver that has the highest average rating
+highest_avg_rating_driver = ""
+rideshare_data.each do |drives|
+  highest_avg_rating = 0
+  avg_rating_array = Array.new
+  total_rating = 0
+  drives.each do |ride|
+    total_rating = total_rating + ride[:rating]
+  end 
+  avg_rating_array << total_rating / drives.length.to_f
+  total_rating = 0
+  avg_rating_array.each do |avg|
+    if avg > highest_avg_rating
+      highest_avg_rating_driver = drives[0][:driver]
+    end
+  end
+end 
+
+puts "The driver with the highest average rating: #{highest_avg_rating_driver}."
+
+
+