To practice iterating over data Degree of Difficulty: Easy. Write a function called find_wards() which takes as parameter(s): A dictionary in the format of the city database as described in Q1 This function should construct and return a list of all the different wards. Each entry in the list should be unique; in other words, dont add the same ward twice. For the input file you were given, the resulting list should be (though not necessarily in this order): Also, note that this function must not change the city database in any way.