9. Given the system of equation as follows 41: + y 52 = 8 2x + By + z = 12 3x y + 42 = 5 (a) Express the system of equations in matrix form AX = B. (2 marks) (b) Find the inverse of matrix A. (10 marks) 10. Solve the following system of equations by using Cramer's rule 2;vc1+:!c2+1c3 =4 4x1+2x2X3 :8 "6x1_3x2+x.g =0 (10 marks)