Use the gure of the contour diagram for at, y) to answer the questions below. 02.1 (a) 5 Points Estimate f(20, 30). Enter your answer as a whole number. 25 Last saved on May 25 at 10:48 PM 022m) 5 Points If we x 3:, is f an increasing or decreasing function of y? 0 increasing 0 decreasing Save Answer 023m) 5 Points If we x y, is f an increasing or decreasing function of 9:? 0 increasing 0 decreasing