If P(A)=0.4P(A) = 0.4P(A)=0.4, P(B∣A)=0.5P(B|A) = 0.5P(B∣A)=0.5, and P(B∣Ac)=0.25P(B|A^c) = 0.25P(B∣Ac)=0.25, calculate P(B)P(B)P(B).
0.3
0.35
0.4
0.45