HE can someone help me with this fr ! Define the variables, write a system and solve.

Mrs. Conner has 4 more students than Mr. Harris. Mrs. Ross has 4 fewer students than Mr. Harris. All together there are 54 students. How many students does each teacher have?

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