Hi! I have been working on the problem below using Baye's Theorem, however I am stuck. Can I please have some help?

Acertain virus infects one in every 200 people. A test used to detect the virus in a person is positive 80% of the time if the person has the virus and 5% of the time if the person does not have the virus. (This 5% result is called a false positive.) Let A be the event "the person is infected" and B be the event "the person tests positive". a) Find the probability that a person has the virus given that they have tested positive, i.e. find P(A| B). Round your answer to the nearest tenth of a percent and do not include a percent sign. b) Find the probability that a person does not have the virus given that they test negative, i.e. find P(A'| 3'). Round your answer to the nearest tenth of a percent and do not include a percent sign