Final answer:
The question involves vehicle maintenance, specifically testing brake function by applying pressure to the pedal and recording stopping time from 50 mph.
Step-by-step explanation:
The instructions provided relate to a procedure commonly used in vehicle maintenance to test the functionality of the brake system. When asked to pump the brake pedal three times and then apply firm pressure, it is a method to ensure that the brake pedal does not show any signs of weakness or sponginess, which could indicate air in the brake lines or other issues. The second part of the task involves driving the car at exactly 50 mph and applying the brakes until the vehicle comes to a complete stop. Recording the time it takes to stop can provide information on the condition and performance of the brakes. It is essential to perform this test in a safe, controlled environment, such as a closed track, to ensure the safety of both the driver and the public.