How would you make an irreversible isothermal expansion/compression cycle of a gas closer to a reversible one?

Question

1. Increase the temperature
2. Decrease the number of steps during expansion and compression
3. Increase the difference between internal and external pressures
4. Decrease the temperature
5. Increase the number of steps during expansion and compression

Answer 1

5 - got it

Answer 2

Yes, it is 5.