Mike and beth are saving money to go to disneyworld. they need at least $1975 in order to go. mike mows yards and beth will wash cars to raise money. mike charges $25 each time he mows a yard and beth charges $15 for each car she washes. the number of cars that beth wash is no more than four times the number of lawns mike has scheduled to mow. beth will wash at least 50 cars. write a set of constraints to model the problem, with x representing the number of lawns mowed and y representing the number of cars washed.