The car A is ascending a parking-garage ramp in the form of a cylindrical helix of 24-ft...

The car A is ascending a parking-garage ramp in the form of a cylindrical helix of 24-ft radius rising 10 ft for each half turn. At the position shown the car has a speed of 15 mi/hr, which is decreasing at the rate of 2 mi/hr per second. Determine the r-, and z-components of the acceleration of the car.