One mole of gas is initially at a pressure of 2.00 atm, volume of 0.300 L, and has an internal energy equal to 91.0 J. In its final state, the gas is at a pressure of 1.50 atm and a volume of 0.800 L, and its internal energy is equal to 182 J. calculate:

 a) the work done on the gas and,

 b) the net energy transferred to the gas by heat in the process.