Given two events A and B, when are each of the following statements true?

Q2.1:P(AB)=P(A)+P(B)-P(A)P(B)

Q2.2:P(AB)=P(A|B)P(B)

Q2.3:P(B)=1

Q2.4:P(A)+P(B)>1

Question 5 options:

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a) when A and B are mutually exclusive events b) when A and B are independent events c) when A and B are mutually exclusive events d) when A and B are complementary events