Question

a train is timed between successive posts, A,B and C, each 2000m apart.
it takes 100seconds to travel from A to B and 150 seconds to travel from B to C.
the deceleration throughout the journey is uniform.

so whats the magnitude of the deceleration??
the velocity of the train B???
and to the nearest m, the distance past C at which the train stops???

thanks :)