15. Ghent-T2 | 2m; y2 I 22 = Tandthepoint Pu[l,i,3]. {4 points] a. Find the equation oi the tangent plane at the point P3. {2 points] to. Find the equation o! the normal line to the given surlace at the point Pi]. 16. Given ap. y) = yet\"? and the point Putt]: 2} {2 points] a. Fund the direction oi moat rapid increase at P\". {2 points] to. Find the direction oi most rapid decrease at P3. {2 points] c. Find the directions oi zero change at Pg