Find the general solution of the linear system. x_1 + 2x_2 = 1 x_1 + 2x_2 + 3x_3 + x_4 = 0 -x_1 - x_2 + x_3 + x_4 = -2 x_2 + x_3 + x_4 = -1 -x_2 + 2x_3 = 0 Determine the values of h and k for which the system has no solution, exactly one solution, or infinitely many solutions. x + hy = 3 4x + 8y = k