Define that b ^= (ad). A What is tr(A1) (0)? (Hint: This can be computed quickly by using the cyclic property of the trace and the outer product representation of A. Do master this trick; it will be used repeatedly in the course and save you much time.) (10) + 1)). Use the same trick above, along with the fact that the trace is linear, to Let +) = quickly evaluate tr(A-|+)(+)).