a) Lightning Industries manufactures four products. The following information is available for each product: Product A Product B Product C Product D Selling price $25 $21 $27 $14 Variable costs $7 $14 $16 $8 # of machine hours 4 3 5 1.5 Lightning Industries' sales are limited by the number of machine hours it has available Required: Provide management with a ranking of the order in which the products should be produced to maximize profit given its limited machine capacity. Show all calculations for full marks