In order to increase the volume of a gas by `10%` , the pressure of the gas should be

In order to increase the volume of a gas to 3 times at constant pressure at 40^(@)C , the final temperature should be

How much should the pressure be increased in order to decrease the volume of a gas by 5% at constant temperature

How much should the pressure be increased in order to decrease the volume of a gas by 5% at constant temperature