The (2 x 2) matrices listed in Eq. (9) are used in several of the exercises that follow. A = 2 = [ } } ] 2 3 c-[ 7 } ] = 1 1 B Z = 0 - 1 3 00 z=[% % ] 00 Exercises 1-6 refer to the matrices in Eq. (9). (9) 1. Find (a) A + B; (b) A + C; (c) 6B; and (d) B+3C. 2. Find (a) B+C; (b) 3A; (c) A+2C; and (d) C+8Z. 3. Find a matrix D such that A+D = B. 4. Find a matrix D such that A+ 2D = C. 5. Find a matrix D such that A + 2B + 2D 3B