Abackpack manufacturer produces an internal frame pack and an one hour and let y represent the number of external frame packs produced in one hour. then the inequalities x+3y< =18,2x+y< =16,x> =0 and y> =0 describe the constraints for manufacturing both packs. use the profit function f(x, y)=50x+80y and the constraints given to determine the maximum profit for manufacturing both packpacks for the given constraints