The piston of a vertical piston-cylinder device containing a gas has a mass of 60 kg and a cross-sectional area 0.04 m$$^2$$. The entire system is placed in a vacuum chamber. If temperature of the gas is $$70^\circ C$$. What is the pressure of gas inside the cylinder? g = 9.8 m/s$$^2$$

A

0.7 bar

B

0 bar

C

0.3 bar

D

0.147 bar