A gas exerts a pressure of 1080 mm HG at 75 C. What pressure is exerted by the gas at 0 C? HELP?

A gas exerts a pressure of 1080 mm HG at 75 C. What pressure is exerted by the gas at 0 C?

Please explain to me. I dont know how to use any of the gas laws for this problem.
Update: I dont think thats right. The answer choices are:
A. 847 mm HG
B. 118 mm Hg
c. 726 mm Hg
D. 1360 mm Hg
2 answers 2