An ideal gas of p=1000 hPa, V=1 m3, T=20 C undergoes the following successive changes: (1) it is warmed under constant pressure until its volume double, (2) it is warmed under constant volume until its pressure doubles, and (3) it expands isothermally until its pressure returns to p=1000 hPa. Calculate the values of p, V, and T for each of these steps.