3. Gwen and Julia are saving money to go to an amusement park. After looking at all the costs, they determine
they need at least $250 to go on the trip. Gwen walks dogs and Julia waters flowers to raise the money.
Gwen charges $3.50 each time she walks a dog. Julia charges $1.25 each time she waters the flowers. The
number of times Julia plans to water the flowers is no more than six times the number of dogs Gwen plans to
walk. Gwen plans to walk no less than 12 dogs.
Write a set of constraints to model the problem, with d representing the number of dogs walked and f
representing the number of times flowers were watered. You should write a total of 3 constraints.