Please help me with this question.

The crew of a stationary spacecraft observe an asteroid whose mass is 4.00 x 1017 kg. Taking the location of the spacecraft as the origin, the asteroid is observed to be at location m at a time 20.2 s after launch time. At a time 21.2 s after launch'time, the asteroid is observed to be at location m. k Assuming that the velocity of the asteroid does not change during this time interval, calculate the final velocity of the asteroid at this location. m/s m/s m/s m/s None of the above