A commuter train travels between two downtown stations. Because the stations are only1.05km apart, the train never reaches its maximum possible cruising speed. The engineer minimizes the timetbetween the two stations by accelerating at a ratea1=0.145for a timet1and then by braking with accelerationa2=0.550 for the remaining timet2. Calculate the minimum time for travelt, in seconds. 7b Calculate the timet1, in seconds.