Solve please

Required information A train is traveling south when the brakes are applied. It slows down with constant acceleration to a speed of 6.00 m/s in a time of 9.00 s. How far does the train travel during the 9.00 s if the train was traveling at 32.4 m/s? If the displacement is toward north, enter a positive value. If the displacement is toward south, enter a negative value. Em