2. Find the critical points and the global maximum and minimum values of x3+2 f($)_:c2+l on the interval [10, 10]. 3. What is the area of the largest triangle that can be formed in the rst quadrant by the xaxis, the yaxis, and a tangent line to y = 65\"? (You may assume that the :c-coorclinate of the tangent point lies in the interval [0, 20].)