1 0 2 Compute each matrix sum or product if it is dened. If an expression is undened, explain why. LetA = [ J, B = J 3 4 3 A + 4B, 2C - 4E, DB, EB Compute the matrix sum A + 4B. Select the correct choice below and, if necessary, ll in the answer box within your choice. (Q A. A + 4B = (Simplify your answer.) O B. The expression A+ 4B is undened because A is not a square matrix. C) C. The expression A+ 4B is undened because Aand 43 have different sizes. 0 D. The expression A+ 4B is undened because B is not a square matrix. Compute the matrix sum 20 4E. Select the correct choice below and, if necessary, ll in the answer box within your choice. O A- 20 4E = (Simplify your answer.) O B. The expression 20 4E is undefined because 20 and 4E have different sizes. O C. The expression 20 4E is undefined because E is not a square matrix. O D. The expression 20 4E is undefined because the number of rows in C is not equal to the number of columns in E. Compute the matrix product DB. Select the correct choice below and, if necessary, ll in the answer box within your choice. O A. DB= (Simplify your answer.) O B. The expression DB is undened because the number of columns in D is not equal to the number of rows in B. O C. The expression DB is undened because the number of columns in D is not equal to the number of columns in B. O D. The expression DB is undened because the number of rows in D is not equal to the number of columns in B. Compute the matrix product EB. Select the correct choice below and, if necessary, ll in the answer box within your choice. O A. EB: (Simplify your answer.) O B. The expression EB is undened because the number of columns in E is not equal to the number of rows in B. O C. The expression EB is undened because the number of columns in E is not equal to the number of columns in B. O D. The expression EB is undened because the number of rows in E is not equal to the number of columns in B