please solve using matlab! and using the inv(A) like question asks

Solve the following simultaneous equations using the Gauss elimination method: + x + 2x2 - xy + x2 +5x, = 8 4x, 2x2 +3xz + x4 3x3 = 4 3x + x2 + 2xy - x + 7x3 = -15 2x, +3x2 +5xz +7x4 5x3 = 8 9x, + x2 + x3 + 7x4 x3 = 10 1) Modify the function given in Figure 9.4 to solve this problem in one single program (not using the function). 2) Use the Matlab function inv(A) to solve this problem and compare your result with the one obtained from 1). Solve the following simultaneous equations using the Gauss elimination method: + x + 2x2 - xy + x2 +5x, = 8 4x, 2x2 +3xz + x4 3x3 = 4 3x + x2 + 2xy - x + 7x3 = -15 2x, +3x2 +5xz +7x4 5x3 = 8 9x, + x2 + x3 + 7x4 x3 = 10 1) Modify the function given in Figure 9.4 to solve this problem in one single program (not using the function). 2) Use the Matlab function inv(A) to solve this problem and compare your result with the one obtained from 1)