EXTRA CREDIT (4PTS) Jonathan owns a food truck that sells tacos and burritos. He only has enough supplies to make 90 tacos or burritos. He sells each taco for $3 each and each burrito for $7. Jonathan must sell at least $420 worth of tacos and burritos each day. If x represents the number of tacos sold and y represents the number of burritos sold. a)Graph the system of inequalities on the next page. b)Write the system of inequalities. Determine one possible solution