a train travel a long stright track starts from rest at point "A" and accelerates uniforming to 20m/s in 20 sec it travels at this speed for 60 sec then slows down uniformly to rest in 40 sec at point "C" it stays at rest for 30 sec then relers direction accelerating uniformly to 10m/s in 10 sec it travel at thise speed for 30 sec then slow down uniformly to rest in 10 sec when it reaches point "B" plot the graph of the motion use your graph to calculate​