McKenna is registering for history class. The morning classes are 1st, 2nd, and 3rd periods, and the afternoon classes are 4th, 5th and 6th periods. Below is a table of teachers and the periods they teach the history class. If McKenna requests an afternoon class, what is the probability that she is assigned Mrs. Wilson? 1st Perry 2nd X 3rd X 4th 5th 6th X King X X Johnson X X X Wilson X X X X X O2 15 00 15