Compute all parts of given problem:
Problem: In the Soapbox Derby, young participants build non-motorized cars with very low-friction wheels. Cars race by rolling down a hill. Assume that the track begins with a 63-ft-long (1 m = 3.28 ft) section tilted 15 below horizontal.
Part I: What is the maximum possible acceleration of a car moving down this stretch of track?
Part II: If a car starts from rest and undergoes this acceleration for the full l, what is its final speed in m/s?
I need help to solve the above question and express your answer to two significant figures and include the appropriate units.