9.11 Given the system of equations 3x2+7x3=2 x1+2x2 x3 = 3 5x1 - 2x2 = 2 (a) Compute the determinant. (b) Use Cramer's rule to solve for the x's. (c) Use Gauss elimination with partial pivoting to solve for the x's. (d) Substitute your results back into the original equations to check your solution.