The position function of a freight train is given by s(t) = 246.2(t + 1) -2 with s in meters and t in seconds. At time t = 6.3 seconds, find the train's velocity and acceleration. O a. velocity is -0.1734 metres/second, acceleration is 0.0713 metres/(seconds squared) O b. velocity is -1.9692 metres/second, acceleration is 0.9377 metres/(seconds squared) O c. velocity is -1.2658 metres/second, acceleration is -0.5202 metres/(seconds squared) O d. velocity is 0.6329 metres/second, acceleration is 0.0867 metres/(seconds squared) O e. velocity is -9.2400 metres/second, acceleration is 3.7973 metres/(seconds squared) O f. velocity is -1.2658 metres/second, acceleration is 0.5202 metres/(seconds squared)