Need some help on this one, i get confused with the second one especially. i have the first and the 3rd one worked out!

The table below describes the smoking habits of a group of asthma sufferers.

Light Heavy

Non-Smoker Smoker Smoker Total__

Men 432 35 31 498

Women 438 39 43 520

Total 870 74 74 1018

a. If a person is randomly selected, find the probability that he or she is not a light smoker.

b. If a person is randomly selected, find the probability of getting a woman given that she is a nonsmoker.

c. Assuming we were to consider a random sample of 13,000 people, how many would you predict are men who are heavy smokers based on the results given here?