If P(B)=0.5P(B) = 0.5P(B)=0.5 and P(A∩B)=0.2P(A \cap B) = 0.2P(A∩B)=0.2, what is P(A∣B)P(A|B)P(A∣B)?
0.1
0.2
0.4
0.7