Two ordinary questions from calculas3, I want an expert to send me the answer urgently, important and necessary

Find parametric equations of the normal line to the surface z = + y2 at the point (2, -3, 10) x = 2 +t, y = -3+ 6t, O z = 10 -t x - 2+t, y = -3 - 6t, O z + 10 + t x = 2 + t, y = -3 - 6t, O z = 10 -t a = 2 - t, y = -3 - 6t, 0 = = 10 - tf(x, y) = 3x - 23- 232+34 has I local max at (-1, 1) II local min at (1, 0) III saddle point at (1, 1) I false, II, III true O I, II true, III false O I, II, III are true O I, II false, III true O