Find the critical points of the functions f (x, y) = x + 2y - 4y+ 10x, 8(x, y) = x - 4xy+ y Use the Second Derivative Test to determine the local minimum, local maximum, and saddle points. (Give your answer as a comma-separated list of points in the form (*, *) where needed. Express numbers in exact form. Use symbolic notation and fractions where needed. Enter DNE if the answer does not exist.) local minimum(s): local maximum(s): saddle point(s): Match f (x, y) and g (x, y) with their graphs. (A) (B) Answer Bank g (x, v) f ( x, y )