Work in thermodynamics

If the work done by a gas is +20J, the work done by the surroundings is...
1. +20 J
2. - 20 J
3. Cannot be determined from this information.
How much work is done by the surroundings?
1. 32 000 J
2. 24 000 J
3. -24 J
4. -24000 J
How much work is done by the gas in this process?
1. -90 J
2. 90 J
3. -90 000J
4. -9 J
How much work is done by the surroundings in this process?
1. 80 J
2. - 80 J
3. 0 J
4. Can't tell from this graph.
What is the work by the gas in this process?
1. 50 J
2. 6 J
3. 32 J
4. -50 J
5. -32 J
If a container has an adjustable top with an area of 0.005 m² and slides up 0.02 m by 100 moles of gas at a temperature of 305 K and a pressure of 253,455 Pa, then how much work is done by the gas.
1. 200 J
2. 0.0001 J
3. 0.01 J
4. 25.3 J