When the temperature of a gas sample filled in a container is increased, it’s pressure increases. Which of the following are the reason(s) for it?

1.    Gas molecules exert more force on each other than before.

2.    Gas molecules move faster than before and strike the walls of the container more often.

3.    Each impact of the gas molecules on the walls of the container yields a greater force than before.

4.    Impacts are now distributed over a smaller area.

Select the correct answer using the codes given below.