0 6 0 -5 0 A = -2 0 1 B = 5 -3 6 -30 2 -1 0 (a) Find A2; (b) Simplify and find 2AAT +5ABT-3ABT. 2) Solve these systems: -2x1 + 2x2 + 4x3 = 6 2x1+x2+2x3 = 8 2x13x2 x3 = 19 -x1-3x3 = 1 X1 3x1+2x2 = 11 3x24x3: 13 3x1x24x3 = 1 3) Find production level, which satisfies this consumption matrix and demand ve 0.1 0.25 A = 0 0.25 0 0.3 0.3 0.2 0.25 10 B = 20 30