Q2Long answer
−5 3 8 −5 3 Hence = 4 2 2 −3 −7 0 2 2 0 −3 −7 3 7 A – A′ 1 3 0 7 = 2 0 2 2 7 −7 0 7 and = −7 0 2 2 Therefore, 11 −5 −3 −7 2 2 2 2 2 2 4 −6 A + A′ A − A′ 7 = = 7 3 5 = A 11 3 3 + 3 + 0 2 2 2 2 2 2 1 −2 4 . −5 3 4 7 −7 0 2 2 2 2 1 3 2