Use Gauss-Jordan row reduction to solve the given system of equations. HINT [See Examples 1-6.] (If there is no solution, enter NO SOLUTION. If the system is dependent, express your answer in terms of x and y, where z = z(x, y), u = u(x, y),

and v = v(x, y).)

xy+zu+v=4

x+y+uv=5

z 9v=1

xy+2zu2v=3

xy+4zu2v=1