The height of the cylinder is 8 inches. 'Ne'll be analyzing the surface area of a round cylinder in other words. the amount of material needed to "make a can". A cylinder (round can} has a circular base and a circular top with vertical sides in between. Let \"r be the radius of the top of the can and let it be the height. The surface area of the cylinder. A. is A = 27rr2 + 21w}: {two circles. one for the top and one for the bottom plus :1 rolled up rectangle for the sides). Areas = H r:- h = halg'tt Area = hI2It1'} p CircumferEHCE 2m Part a: Assume that the height of your cylinder is 8 inches. Consider A as a function of r. so we can write that as A (r) = 2 'J'l'T2 + 16 me. 1What is the domain of A (r)? In other words. for which Tcalues of r is A (1*) defined