You are in a bus traveling on a straight road at 20 m/s. As you pass a gas station, your clock and a clock in the station read precisely 0. You pass another gas station 900 m farther down the road. (In the frame of reference of the gas stations, all gas station clocks are synchronized.) (a) As you pass the second station, do you find its clock to be ahead of, or behind your own clock, and (b) by how much?