Calculus Exercises: 3 31 '2!3 4 ' b. Christopher wants to recycle some elliptic cardboard into rectangular name plates. The minor and major axes of each ellipse are of lengths 10 cm and 20 cm, respectively. What should be the dimensions of each name plate so that the usage of cardboard materials is maximized? 1 . Answer the following problems: a. Find the absolute extrema of f[X) = 2 csc x + cot X on the interval ( y Htlni