Gotham City must determine how to allocate ambulances during the next year. It costs $5000 per year to run an ambulance. Each ambulance must be assigned to one of two districts. Let xi be the number of ambulances assigned to district i, for i = 1, 2. The average time (in minutes) it takes for an ambulance to respond to a call from district 1 is 40 3x1; for district 2, the time is 50 4x2. Gotham City has three goals (listed in order of priority):

Goal 1: At most $100, 000 per year should be spent on ambulance service. Goal 2: Average response time in district 1 should be at most 5 minutes. Goal 3: Average response time in district 2 should be at most five minutes.

Use goal programming to determine how many ambulances to assign to each district.

How does your answer change if Goal 2 has the highest priority, then Goal 3, and then Goal 1?