Display the values of the function in two ways: (a) by sketching the surface z = f(x.y) and (b) by drawing an assortment of level curves in the function's domain. f(x.y) = 4x² a. Choose the correct sketch of f(x,y)= 4x2 below. OA. O B. OC. b. Choose the correct graph of the level curves below. OA. OB. OC.

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