What is the volume (chemistry homework)?

I am taking an online chemistry class (so it's basically self-taught). I had a hoemwork assignment that had 50 questions on it. I completed the ones I knew, but I'm stuck on a few. I'm hoping someone might be able to help.

1)Suppose 52.4 L of a gas is at a temperature of -73°C.

If its temperature is increased to 596°C, what will its volume be then?

(3 significant figures)

2)A meteorological balloon contains 232 L of helium at 23°C and 0.952 atm.

If the volume of the balloon can vary according to external conditions,

what volume would it occupy at an altitude at which the temperature is -52°C and the pressure is 0.022 atm?

(2 significant figures, n.nEn)

Any help would be greatly appreciated, I'm stumped. Thank you!!