I care more about the explanation... Don't skip steps thanks!

2. Consider the metian f : R3 } R dened by ee?!) = maze3:22 and the paint p : [1,1,2]. [a] For what value of e doe; 1: lie on the level surface it, y, z) : c? [h] Find a. unit normal vector n to the level slufaee at p : {1, 1, 2]. (e) Find the equation for the tangent plane at p : [1, 1, 2) to the level surface