Assume air contains 21% oxygen and 79% nitrogen. If air is compressed to 5.5atm, what is the partial pressure of the oxygen?

Question

$\begin{array}{1 1} (a)\; 1.16\;atm \\ (b)\; 3.52\;atm \\ (c)\; 2.23\;atm \\ (d)\; 4.34\;atm \end{array}$