The height of a ball t seconds after it is thrown upward from a height of 6 feet and with an initial velocity of 80 feet per second isf (t) = -16t² + 80t + 6.(a) Verify that f(2)= f(3).f(2)= 102f(3) = 102(b) According to Rolle's Theorem, what must be the velocity at some time in the interval (2, 3)?