1. Given linear system below :
v + 2w - y + z = 1
3y + x - z = 2
x + 7y = 1
a. Compute the Coefficient Matrix A, The State variable vector X and the input vector B
b. Determine the sizes of A, X and B
c. Write down the system as A*X=B
d. Write down a MATLAB code to solve any linear system of three equations and three variables