A Fixed mass of gas omits 250J at heat energy and contracts at constant pressure of Ix10 Pa from 2.5 from 2.5x10^3m^3 to 1.0x10^-3m^3. what is the change in internal energy U?

The basketball coach tells his team to run sprints back and forth across the court, which is 30 m long. they start at the left end of the court, run back and forth 6 times, then end back at the left end of the court where they began. what distance did they run? what is their displacement?