1) Consider the augmented matrix: WOP -1 2 B a. Write the system of equations that the matrix represents. b. Solve the system. (Reminder: to get credit for this question, you must use elimination.) 2) For each row operation described, write it as a 3-by-3 transformation matrix. [That is, left-multiplying another matrix by the matrix you provide should be equivalent to the given row operation.} a. Adding three times Row 1 to Row 3 [R,+ 38, - R,) b. Swapping Row 2 and Row 3 (R, + Ry) C. Scaling Row 1 by a factor of -7 (-78, - R1) 3) Let A = Use Gauss-Jordan elimination to find A 1