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Julia is an 18 year old mom and has a 2 year old son named Toby. She doesn't know who the father is, as she has had 5 one night stands with 5 men 2 years ago. Worried that Toby will yearn for a father figure as he gets older, she goes to the Maury show along with the 5 different men to varify who the father is. However, due to time restrictions on the show she was forced to choose one she was most sure of. Out of the 5 she chose a guy named Craig. He takes the paternity test given, which is 99% accurate, meaning that the test is correct 99% of the time.

If there is a 20% chance that he is the father, what is the probability that that man will test positive for being the father of Julia's son?.