40. The prior probabilities for events A, and A, are P(4,)=0.4 and P(4,)=0.6. It is also known that P(A; N A;)=0. Suppose P(B|4,)=0.2 and P(B|A;)=0.05. What is P(4,|B)? a.0.7273 b. 0.2727 c. 0.008 d. 0.03