The help I'm finding is showing incorrect. Can you help with explanation and these 3 questions.

Sep 3 III We'll be analyztng the surtace area of a round cylinder - in other words the amount ot 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 h be the height. The surface area of the cylinder, A, is A : 27rr2 + 27m (it's two circles for the top and bottom plus it rolled up rectangle for the side). r.= radius \"a Areas = K r-\" h = he'Em - Are = hth') Circumference 2:\" Part 2: Assume that the height of your cylinder is 6 inches. Consider A as a function oh\