If P(A)=0.25P(A) = 0.25P(A)=0.25, P(B)=0.40P(B) = 0.40P(B)=0.40, and P(A∪B)=0.55P(A \cup B) = 0.55P(A∪B)=0.55, what is P(Ac∣B)P(A^c | B)P(Ac∣B)?
0.25
0.375
0.625
0.5