diff --git a/sara_nilsen.rb b/sara_nilsen.rb
new file mode 100644
index 0000000..dabc2b8
--- /dev/null
+++ b/sara_nilsen.rb
@@ -0,0 +1,131 @@
+uber_data = 
+{  
+    "DR0001": [
+    
+    { 
+      rider_id: "RD0003", 
+      date_ride: "3rd Feb 2016",
+      cost: 10,
+      rating: 3
+    },
+    { 
+      rider_id: "RD0015",
+      date_ride: "3rd Feb 2016",
+      cost: 30,
+      rating:  4
+    },
+    { 
+      rider_id: "RD0003",
+      date_ride: "5th Feb 2016",
+      cost: 45,
+      rating: 2
+    }
+  ],
+  
+  "DR0002": [
+
+    {
+      rider_id: "RD0073",
+      date_ride: "3rd Feb 2016",
+      cost: 25,
+      rating: 5
+    },
+    { 
+      rider_id: "RD0013",
+      date_ride: "4th Feb 2016",
+      cost: 15,
+      rating: 1
+    },
+    {
+      rider_id: "RD0066",
+      date_ride: "5th Feb 2016",
+      cost: 35,
+      rating: 3
+    }
+  ], 
+
+    "DR0003":
+    [
+    {
+      rider_id: "RD0066",
+      date_ride: "4th Feb 2016",
+      cost: 5,
+      rating: 5
+    },
+    {
+      rider_id: "RD0003",
+      date_ride: "5th Feb 2016",
+      cost: 50,
+      rating: 2
+    }
+  ],
+
+    "DR0004": [
+    {
+      rider_id: "RD0022",
+      date_ride: "3rd Feb 2016",
+      cost: 5,
+      rating: 5
+    },
+    {
+      rider_id: "RD0022",
+      date_ride: "4th Feb 2016",
+      cost: 10,
+      rating: 4
+    },
+    {
+      rider_id: "RD0073",
+      date_ride: "5th Feb 2016",
+      cost: 20,
+      rating: 5 
+    }
+  ]
+}
+
+def get_total_money(ride_data)
+  t_money_made = 0
+  ride_data.each do |info|
+    t_money_made += info[:cost]
+  end 
+  return t_money_made 
+end 
+
+
+def get_rating_average(ride_data)
+  total_rate = 0.0 
+  rate_info = ride_data.map do |info|
+    total_rate += info[:rating]
+  end 
+  return total_rate / rate_info.length   
+end 
+
+puts "Driver amount of rides"
+uber_data.each do |driver, info|
+  puts "Driver #{driver}: #{info.length} rides."
+end  
+puts ""
+most_money = 0 
+driver_most_money = ""
+puts "Total amount earned by each driver"
+uber_data.each do |driver, info|
+  total_money = get_total_money(info)
+  puts "Driver #{driver}: $#{total_money}"
+  if total_money > most_money
+    most_money = total_money
+    driver_most_money = driver 
+  end 
+end 
+puts ""
+most_average = 0
+driver_most_average = ""
+uber_data.each do |driver, info|
+  rating_average = get_rating_average(info)
+  puts "The average rating of Driver #{driver} %0.2f" %[rating_average]
+  if rating_average > most_average
+    most_average = rating_average
+    driver_most_average = driver
+  end 
+end 
+puts ""
+puts "The driver who made the most money: #{driver_most_money}."
+puts "The driver with the highest rating #{driver_most_average}."