Please explain to me step by step.

3?. II According to recent typical test data, a Ford Focus travels 0.250 mi in 19.9 5., starting from resL The same cart, when braking from 60.0 nii/h on dry pavement, stops in 146 ft. Assume constant acceleration in each pan of its motion, but not necessarily Ithe same acceleration when slowing down as when speeding up. (a) Find this car's acceleration while braking and while speeding up. {b} If its ac- celeration is constant while speeding up, how fast (in 111i / h) will the car be traveling after 0.250 mi of acceleration? {c} How long does it take the car to stop while braking from 60.0 mi / h'? ,1 hip, calculate how long it lasts. 66. II Egg drop. You are on the roof of the physics building of your school, 46.0 m above the ground. (See Figure 2.55.) Your physics professor, who is 1.80 m tall, is walking alongside the 46.0 m building at a constant speed of 1.20 m/s. If you wish to drop an egg on your professor's head, v = 1.20 m/s where should the professor be when you release the egg, as- 1.80 m suming that the egg encounters no appreciable air drag? Figure 2.55 Problem 66