Question 1 1 I Find the boundary of the closed triangular region with vertices (0,0L (0,2L and {4,0}. Hint: this will consist of three segments. Question 2 Find the critical points of f(x,y) = x + y - xy. Find the value of f on these points.Question 3 1 Find the absolute maximum value and absolute minimum value of f(x,y) = x + y - xy on the closed triangular region with vertices (0,0), (0,2), and (4,0). This will use your answers to the previous questions