count_words(sentence): returns a dictionary with all the words in sentence in lower case as keys, and the value of each key is the number of times that word appears in a sentence. You can assume that...

Implement the following funciton:

*Code should be in python

Extracted text: count_words(sentence): returns a dictionary with all the words in sentence in lower case as keys, and the value of each key is the number of times that word appears in a sentence. You can assume that sentences will only have letters, spaces, commas and dots.