2. COMPUTE EACH MATRIX SUM OR PRODUCT IF IT IS DEFINED. IF AN EXPRESSION IS NOT DEFINED, EXPLAIN WHY. A [ 2 0 B 4-5 2 [} 7-5 1 1-4 -3 1 3 C = E -2 4 D= [-} }] = [}] 1. -2A, B 2A, AC, CD 2. A+ 3B, 2C - 3E, DB, EC