Consider the following.
3(x-3)² + (y-2)² + (z - 2)² = 21, (4, 5, 5)
(a) Find an equation of the tangent plane to the given surface at the specified point.
6x + 5y + 5z = 74
(b) Find an equation of the normal line to the given surface at the specified point.
(x(t), y(t), z(t)) = (4 + 6t, 5 + 5t, 5 + 5t)