Consider an ideal gas contained in a cylinder and separated by a frictionless adiabatic piston into two sections A and B. A thermostat surrounding B keeps its temperature constant. There are 2 moles of the gas in each section. Initially, TA = TB = 300 K, VA = Vs = 2 liters. Energy is supplied as heat to A and the %3D piston moves to the right reversibly until the final volume of Section B is 1 liter. Calculate the entropy change in A and B, and the entropy change of the total system and its surroundings. Here Cy of the gas is given to be 20 J/(K-mole).