Astore sells two brands of camping chairs. the store pays $8080 for each brand a chair and $6060 for each brand b chair. the research department has estimated that the weekly demand equations for these two competitive products to be the following, where p is the selling price for brand a, q is the selling price for brand b, and x and y are the average number of chairs sold per week. complete parts (a) and (b) below. a) detetmine the demands x and y when p=$100 and q=$120

b) how should the store price each chair to maximize weekly profit? what is the maximum weekly profit?