The function describing the predicted velocity as a function of time, v(t) , for a student-designed prototype two-stage model rocket during a 5.5 s time interval is given by v(t)=t3 t2 t , where =3.0m/s4 , =24m/s3 , and =54m/s2 . Due to ignition rates of the fuel in the two stages and external forces acting on the rocket, the design produces a velocity function that has both a local minimum and a local maximum during the time interval. Part F Determine the times at which v(t) has a local minimum and maximum. Express your answer as two numbers separated by a comma