Emily and Frank are saving money to go on a trip. They need at least $2015 to go. Emily mows lawns and Frank walks dogs to raise money. Emily charges $20 each time she mows a lawn and Frank charges $5 each time he walks a dog. The number of dog walks that Frank has scheduled is no more than three times the number of lawns Emily has scheduled to mow. Frank will walk at least 35 dogs. Write a set of constraints to model the problem with x representing the number of lawns mowed and y representing the number of dogs walked. Enter your answers in the boxes to correctly complete each constraint.