3. (2 pt) The table shows some values of a function f(x, y). Use the values in the table to find the following: (show work, 2 decimals) y f(x, y) 10 20 30 40 50 5 70.2 76.6 82.2 90.7 100.4 X 10 68.3 73.7 79.4 86.5 90.5 15 65.4 69.9 73.4 78.3 82.6 20 62.6 65.8 68.6 72.1 75.2 25 60.8 63.7 67.8 72.0 77.4 a) Approximate ax (10,30) af b) Approximate ay (10,30) c) Use your responses from parts a) and b) to approximate f(12,34). (Show work)