Let AAA and BBB be events such that P(A)=13P(A) = \frac{1}{3}P(A)=31, P(B)=14P(B) = \frac{1}{4}P(B)=41, and P(A∣B)=12P(A|B) = \frac{1}{2}P(A∣B)=21. Find P(Bc∣Ac)P(B^c | A^c)P(Bc∣Ac).
12\frac{1}{2}21
1116\frac{11}{16}1611
78\frac{7}{8}87
56\frac{5}{6}65