Write your answers and work on separate sheets of paper. show all work. 1. find all critical points of the given function and at each critical point determine whether the function has a relative max, relative min, or saddle point. a) f(x, y)=2.2-6: ry + y2-2x + 6y b) f(, y) 42-4y 5y2-410y 2. use the method of lagrange multipliers to find the maximum value of f(x, y) = ry, subject to the constraint 2.2 + 4y2-2.