Complete the following problems and submit them in your PDF file. Make sure to show your work and to do so in a neat and orderly manner. a. Given A=251326221B=121211111C=[2713]D=122131 What are the scalar values for the following matrix elements: i. A(1,3) ii. A(3,2) iii. C(1,2) iv. D(2,1) b. Perform the following matrix operation on row 3 of matrix A and show the resulting new matrix after the operation: R3+(1/2)R1 c. State whether each of the following matrix operations is possible. If the operation is possible, show the answer. i. A+B ii. A+C iii. A+D iv. AB v. AC vi. AD vii. CD viii. DC ix. 3B