When the motorcyclist is at A, he increases his speed along the vertical circular path at...

When the motorcyclist is at A, he increases his speed along the vertical circular path at the rate of  = (0.045) ft/s2 where s is in ft. If he starts at vA = 2 ft/s where s = 0 at A, determine the magnitude of his velocity when he reaches B. Also, what is his initial acceleration?