8 of 27 The position in feet of a race car along a straight line after t seconds is modeled by the function . Find the average velocity of the vehicle, , between 1 = 2 sec and t2 = 8 sec. Then, using the limit , find the instantaneous velocity at t = 5 sec. (Round all values to the nearest tenth.) ft Vavg = 63 : instantaneous velocity: v (5 ) =s' (5) =63.8 ft sec sec ft ft Vavg = 63 : instantaneous velocity: v (3) =s' (5) =63.7 sec sec ft ft Vavg 63 ; instantaneous velocity: v (3 ) = s' (5) =63.8 sec sec ft ft Vavg 63 ; instantaneous velocity: v (3) =s' (5) =63.7- sec sec