*Q7: [Exercise 17] For each of the following functions, nd V f : (i) flay) = (33+1)2 + (y 2)2 +1, (ii) f($7y) : x2iy27 Where any > 0: (in) m, y, z) : smog/2). For (i) are there any critical points in the (313', y) plane Where V f =