Consider the following matrix. 3 4 6 -4 (a) Perform the row operations to solve the augmented matrix (1) Add R2 to R1. (i1) Add -2 times R1 to R2. (iii) Multiply R2 by (iv) Multiply R1 by(b) Write the system of linear equations represented by the augmented matrix. J - 3X + 4y = 29 6x - 4y = -38 O 3x - 4y = 29 -6x + 4y = -38 -6x + 8y = 29 6x - 4y = -76 6x - 8y = 29 -6x + 4y =-76 0 -3x + 4y = 29 3x = -9 Solve the system of linear equations. (x, y) = (c) Compare the two solution methods. Which do you prefer