For supercritical carbon dioxide, predict the effect that the following changes will have on the elution time

Question:

For supercritical carbon dioxide, predict the effect that the following changes will have on the elution time in an SFC experiment.
(a) Increase the flow rate (at constant temperature and pressure).
(b) Increase the pressure (at constant temperature and flow rate).
(c) Increase the temperature (at constant pressure and flow rate).