You have a gas confined to a cylinder with a movable piston. What would happen to the gas pressure inside the cylinder if you do the following?
(a) Decrease the volume to one-fourth the original volume while holding the temperature constant.
(b) Reduce the temperature (in kelvins) to half its original value while holding the volume constant.
(c) Reduce the amount of gas to one-fourth while keeping the volume and temperature constant.