3 . [30 pts] Write a MATLAB script that solves system of linear equations. Ax = B 1-5 A = 1 4 2 2 -8 6 -7] B = 6 -5 3 -1 Display the result of x in the command window. In the same script, calculate the moment caused by a group of forces applied to a moment arm. T= rf r = [358] F 2 -2 2 2 2 7 -3 -7] 3 -5