2. (a) Give an example of a function f(x, y) that would require the Product Rule in computing fr(I, y). Compute fx for the function you gave. (b) Give an example of a function g(x, y) that would require the Chain Rule in computing gy (x, y). Compute gy for the function you gave. 30 K DII DD F3 FS F9 @ % & W# N 8 O Q W E R T Y U O P A S D F G H . . K 11 Z X C V B N .V M T command command option