The displacement of a particle is s(t)=t3−6t2+9t metres, where t is in seconds.
(i) Find the average velocity on the interval [1s,3s].
(ii) Find the instantaneous velocity at t=3 s.
Select the correct ordered pair (average velocity,instantaneous velocity).
a) (2m/s,0m/s)
b) (−2m/s,0m/s)
c) (−4m/s,0m/s)
d) (−2m/s,−2m/s)