If det(A)=4\det(A) = 4det(A)=4 and det(B)=−1\det(B) = -1det(B)=−1 (both 2×22 \times 22×2 matrices), what is det(A−1B−1)\det(A^{-1}B^{-1})det(A−1B−1)?
−14-\frac{1}{4}−41
14\frac{1}{4}41
−4-4−4
444