Please help with practice problems 1 and 2.

1.

\fFind the critical point(s) of the function. f(x,y) = x3y+12x2 3y +1 (Give your answer as a comma-separated list of points in the form (*,*) if needed. Express numbers in exact form. Use symbolic notation and fractions where needed.) MW 2 Compute the discriminant D(x, )2). (Express numbers in exact form. Use symbolic notation and fractions where needed.) M?) = Categorize the critical point(s). 0 local maximum 0 local minimum 0 saddle point 0 none of the above