What is the total kinetic energy of all the molecules in a room whose volume is (310 , m³) if the pressure of the air in the room is (101,000 , Pa)? (Assume the molecules act as though they are monatomic.)

a) (2 × 10⁵ , J)
b) (5 × 10⁵ , J)
c) (1 × 10⁶ , J)
d) (2 × 10⁶ , J)