4. Consider the polar curve r=5+3sin 0. a) Use calculator to sketch the curve. b) Find the area of the region enclosed by the curve. c) Set up an integral for the length of the curve. 5. Consider the polar curve r = 3 cos(40). a) Use calculator to sketch the curve. b) Find the area of the region enclosed by one loop of the curve. c) Set up an integral for the length of one loop of the curve.