use python

Design a function called bill_with_tip that takes two arguments:

a. a floating-point value representing the bill for dinner at a restaurant

b. a string representing the service, which is either bad, average, good, or excellent

The bill_with_tip function calculates and returns a floating-point value representing the final bill amount after combining a tip with the original bill. The tip amount depends on the service:

- 10% tip for bad service

- 15% tip for average service

- 20% tip for good service

- 25% tip for excellent service

Note: The only possible values for the service are 'bad', 'average', 'good', and 'excellent'