At the first stop on a subway line, 50 passengers entered the train. The chart shows the number of passengers that entered and exited the train for the next 5 stops. How many passengers were on the train when the train departed from stop 5?

Which of the following transformations will make coincide with ? a. counter-clockwise rotation 90º about a, followed by a translation 5 units to the right b. translation 5 units to the right, followed by a reflection across the y-axis c. translation 5 units to the right, followed by a reflection across the x-axis d. translation 1 unit up and 5 units to the right, followed by a reflection across the x-axis