a company produces canned food in closed cylindrical aluminum cans. each of the cans needs to hold 12 oz (approximately 21.7 in ) of food. let be the surface area of the can. create a function , where is the radius of the can. find the domain of the function. compute the first derivative and find the critical point(s) of the area function. find the open intervals where is increasing and/or decreasing. find the local max/min of . find the minimum surface area of the can and the dimensions (radius and height) of the can.