Consider the following sequence of expressions: animals = { 'a': ['aardvark'], 'b': ['baboon'], 'c': ['coati']} animals['d'] = ['donkey'] animals['d'].append('dog') animals['d'].append('dingo') we want to write some simple procedures that work on dictionaries to return information. first, write a procedure, called how_many, which returns the sum of the number of values associated with a dictionary. for example: > > > print(how_many(animals)) 6