Describe the solutions of the first system of equations below in parametric vector form. Provide a geometric comparison with the solution set of the second system of equations shown below. X1 - 3x2 + 7*3 = -5 *1 - 3*2 + 7X3 = 0 2x1 + X2 + 7Xg = = 17 2x1 + *2 + 7X3= 0 where the solution set is x = Xz - X1 - 4X2 = 12 - X1 - 4x2 =0 Describe the solution set of the first system of equations in parametric vector form, Select the correct choice below and fill in the answer box(es) within your choice. OA. X= O B. X=X2 O C. X= + X3 OD. X= X2 + X3