Need help on question b the two blank boxes with explanation. Please and thank you

(1 point) For two events A and B. P(A) - 0.6 and P( B) = 0.3. (a) If A and B are independent, then P(AU B) - .72 P(An B) = .18 P(A B) 6 (b) If A and B are dependent and P( A B) - 0.9, then P(AnB) P(B A)