A motorcyclist travels around a curved path that has a radius of 400ft . While traveling around the curved path, the motorcyclist increases speed by 1.25ft/s^2 . Part A - Finding the time interval for the motorcyclist to reach a given acceleration If the motorcyclist starts from rest, determine the time needed to reach an acceleration of 5.25ft/s^2 . Part B - Speed of the Motorcyclist at a Given Acceleration Determine the speed of the motorcyclist at the instant the acceleration is 7.00ft/s^2. Part C - Magnitude of the Motorcyclist's Acceleration at a Given Speed Determine the magnitude of the acceleration at the instant the speed of the motorcyclist is 29ft/s Part D - Maximum Constant Speed of the Motorcyclist Determine the maximum constant speed of the motorcyclist when the maximum acceleration is 7.00ft/s^2.