All the questions are in the picture

Problem 4. (a) Maximize 3\" (any) 2 m2 +y2 subject to 2:1: +y S 2, x 2 0 and y 2 0. (b) Use the Envelope Theorem to estimate the maximal value of the objective function in part (a) when the rst constraint is changed to 253+ Egg 3 2, the second constraint is changed to :c 2 0.1, and the third to y 2 U.1