Find currents I, I2 and 13 based on the following circuit: 3 9V 122 ^^^ AAA 202 102 6 V 122 [a] Write linear equations in terms of I1, I2 and 13 based on the given circuit. [b] Write the equations from part a in augmented matrix form. [c] Use elementary row operations to reduce the system of equations from part b into its equivalent reduced row-echelon form. [d] From your result in part c, what are currents I, I2 and I3?