Can someone help me figure out how to derive these answers, please include the formulas used and a little bit of an explanation?

Question 1: A study selected a random sample of 500 students to investigate the effect of exposure to cold and the development of influenza. The different probabilities are shown below. Let A = probability of exposure to cold, and A' = not exposed to cold B = probability of developing influenza, and B' = did not get influenza Table 1: B B' A 0.42 0.12 A' 0.18 0.28 Use the table above to find the following: (To receive full credit, please show how you arrived at your answer. Each question is 2 points.) 1. P(B') 2. P(A) 3. P(AB') 4. P(A'B' 5. P(A'B) 6. P(A' UB') 7. P(A' VB) 8. P (B' | A) 9. P(A | B') 10. P(B| A)