Final answer:
The travel time for the first part of the trip is 3.25 hours and the travel time for the last part of the trip is 1 hour.
Step-by-step explanation:
To find the travel time for each part of the trip, we can set up a system of equations. Let's assume the time taken for the first part of the trip is x hours. Since the total trip took 4 hours and 15 minutes, or 4.25 hours, we can set up the equation x + (4.25 - x) = 4.25. Solving this equation, we find x = 3.25. Therefore, the travel time for the first part of the trip is 3.25 hours and the travel time for the last part of the trip is 4.25 - 3.25 = 1 hour.