Givenz = f(x,y), x = 2s + 3t and y = 3s 2t, use the Chain Rule to write % in terms of the second order partial derivatives of f(x,y). (18 points) Find the direction in which the function f(x,y) = x*y x2y? decreases fastest at point (2, 3). What is the rate of decrease? (12 points)