Hi! I’m stuck trying to figure it out how to create a function for the question number 3

**3. If your total budget for the trip is $1000, which city should you visit to maximize the duration of your trip? Which city should you visit if you want to minimize the duration?**

I solved the previous questions this way:

```
# Exercise 1
paris = [200, 20, 200]
london = [250, 30, 120]
dubai = [370, 15, 80]
mumbai = [450, 10, 70]
def cost_of_trip(flight, hotel, car):
cost = flight + hotel * 7 + car
return cost
print(cost_of_trip(*paris), ': Paris') # the '*' unpacks the list to arguments for the function
print(cost_of_trip(*london), ': London')
print(cost_of_trip(*dubai), ': Dubai')
print(cost_of_trip(*mumbai), ': Mumbai')
# You should visit Paris to spend the least amount of money in a week
```

```
# Exercise 2
import math
def cost_of_trip(flight, hotel, car, days):
'''calculates the cost of the trip taking
into account the number of days'''
car_cost = car * math.ceil(days/7)
cost = flight + hotel * days + car_cost
return cost
```