A Sample of Gas at 475 $\degree$ C Is Allowed to Cool at Constant Volume Until Its

A sample of gas at 475.0 $\degree$ C is allowed to cool at constant volume until its pressure is one-fifth of its original value.What is the final temperature of the gas?

A) (-50.67 $\degree$ C)
B) 95.00 $\degree$ C
C) 273.2 $\degree$ C
D) 149.6 $\degree$ C
E) (-123.5 $\degree$ C)