4. Letx,y, z) = x" + sin(y) 2.22 = 0 dene a surface in 3 dimensions. a. Find the equation of the normal line to the surface a! (21E, 0, 3/2). I). Find a point which is at a distance of 4 from the tangent plane at the point (21:, 0, 3/2). [Hint you have the normal to this plane. . . .)