a=[1 0 00−1 00 0 1] and ab=[−1 0 0 0−1 0 0 0−1] . which matrix is matrix b?
a. [1 0 00−1 00 0 1]
b. [−1 0 0 0 1 0 0 0−1]
c. [1 0 00−1 00 0−1]
d. [−1 0 0 0−1 0 0 0 1]