STIHL, Inc Manufacturers gasoline powered chain saws for professional, commercial, farm, and consumer markets. To "better serve" their customers, STIHL offers its chain saws in four different quality lines and associated price ranges: occasional use, midrange, professional, and arborist. Under what circumstances could offering multiple qualities of a product line be price discrimination? What form of price discrimination might this represent- first, second, or third degree price discrimination? describe why this practice could increase profit at STIHL.