Suppose that X1=-1, x2=2, x3=4, x4=-3 is a solution of a non-homogeneous linear system Ax = b and that the solution set of the homogeneous system Ax=0 is given by the formulas:
x1= -3r +4s, x2=r-s, x3=r, x3=s
a) Find the vector form of the general solution of Ax=b
b) Find the vector form of the general solution Ax=b