Consider x = h (y, z) as a parametrized surface (y, z) in the natural way. Write the equation of the tangent plane to the

Consider x = h (y, z) as a parametrized surface Φ(y, z) in the natural way. Write the equation of the tangent plane to the surface at the point (–5, 1, –1) [with the coefficient of x being 1] given that ∂h/∂y (1, –1) = –1 and ∂h/∂y (1, –1) = 1.