text: users = [
      { "id": 0, "name": "Hero" },
      { "id": 1, "name": "Dunn" },
      { "id": 2, "name": "Sue" },
      { "id": 3, "name": "Chi" },
      { "id": 4, "name": "Thor" },
      { "id": 5, "name": "Clive" },
      { "id": 6, "name": "Hicks" },
      { "id": 7, "name": "Devin" },
      { "id": 8, "name": "Kate" },
      { "id": 9, "name": "Klein" },
  ]
  
  friendships = [(0, 1), (0, 2), (1, 2), (1, 3), (2, 3), (3, 4), 
                 (4, 5), (5, 6), (5, 7), (6, 8), (7, 8), (8, 9)]
  
  for user in users:
      user["friends"] = []
  
  for i, j in friendships:
      users[i]["friends"].append(users[j])
      users[j]["friends"].append(users[i])
  
  def number_of_friends(user):
      """how many friends?"""
      return len(user["friends"])
  
  total_connections = sum(number_of_friends(user) for user in users)
  
  print("total connections: " + str(total_connections))
  
  num_users = len(users)
  
  average_connections = total_connections / num_users
  
  print("average connections: "+ str(average_connections))
  print(average_connections)