A train travels between stations 1 and 2, as shown in the figure. The engineer of the train is instructed to start from rest at station 1 and accelerate uniformly between points Aand B, then coast with a uniform velocity be-tween points B and C, and finally decelerateuniformly between points C and D until thetrain stops at station 2. The distances AB, BC, and CD are all equal, and it takes 5.22min to travel between the two stations. As-sume that the uniform accelerations have thesame magnitude, even when they are oppositein direction. What amount of time does the train spend between AB, BC, and CD?