What happen at increasing pressure at constant tempreture

For an exothermic reaction, what happens to the equilibrium constant if temperature is increased?

When pressure is increased upon a gas at constant temperature

A graph is plotted between pressure and volume at different temperature. On the basis of the graph what changes will you observe in the volume if (i) the pressure is increased at constant temperature (ii) the temperature is decreased at constant pressure

A graph is plotted between pressure and volume at different temperatures . On the basis of the graph what changes will you observe in the volume if (i) the pressure is increased at constant temperature . (ii) the temperature is decreased at constant pressure .

What should be the percentage increase in pressure for a 5% decrease in volume of gas at constant temperature ?