Try to sketch by hand the curve of intersection of the parabolic cylinder y = x and the top half of the ellipsoid x2 + 3y + 3z = 9. Then find parametric equations for this curve. (x(t), y(t), z(t)) = for -1.3 sts 1.3 Use these equations to graph the curve. (Select Update Graph to see your response plotted on the screen. Select the Submit button to grade your response.)