For each of the following, identify the correct "X" answer

1. For two mutually exclusive events A and B, P(A) = 0.4 and P(B) = 0.5 then P(B/A) is "X"?
2. For two independent events A and B, P(B|A) = 0.3 and then P(B) is "X"?
3. for an event A, P(A intersection A') = 1, in which A' is the complement of event A. This is True or False statement?
4. In the attached Venn diagram, shaded region represent the A intersection B'. This is a True or False statement?
   

A