Hey ducksmad. Sounds a little like physics 160 there..
but anyway.
for A-1). just use PV = nRT. the question suggests constant pressure. So Charles law applies?
\frac{V_{1}}{T_{1}} = \frac{V_{2}}{T_{2}}
Um... so .
Let {V_{1}} = volume of the lung (4.98L)
Let {T_{1}} = temperature of the...