1. Find absolute max/min for the given function with the specified domain. f(x,y)= x^2-xy+y^2 on the circular disk x^2+y^2 less/equal 4, use parametrization when checking boundary. 2. f(x,y)= x^2-xy+y^2 x^2+y^2 less/equal 4 3. The only thing I understand so far is that I must change the boundary to parametric equation. (x= rcos(t) and y=rsin(t)). I think t is bounded openly between 0 and 2. Also I think i use the chain rule to find equation and set it in terms of t to check points. Help Please!