Find a and that solve the vector equation: a () + (3) = (37) 1 17 31 = Suppose the above equation is expressed as Ax = b with a Express the coeffieints of the equations in on matrix form as (A|B)= b) Complete the missing column of the following matrix derived by doing row operation of the augmented matrix in a): c) 1 -2 0 1 d) B =