I need help solving the 5 problems shown in the screenshot. Please be organized so that I can follow along.

Answer the following questions. 1. Determine and classify the critical point(s) of f(x, y) = 2x2 + 4xy + 5y. Use the second derivative test to justify your answer. 2. Determine and classify the critical points of the function f(x, y) = 6xy(18 -2x -3y). Use the second derivative test to justify your answer. 3. Determine the maximum value of f(x, y) = 2x2 + 4xy + 5y on the curve x2 + y2 = 5. 4. Determine the minimum value of f(x, y) = 2x2 + 2xy + 3y on the region x2 + y?