Which is the correct formula for the maximum inventory in the EPQ model?

$(\frac{Q_p}{p})(p-u)$

$(\frac{I_{\text{m}\text{a}\text{x}}}{2})H$

$\sqrt[\frac{2DS}{H}]{\frac{p}{p-u}}$

$($Q$/2)$H $+($D$/$Q$)$S

$(\frac{I_{\text{m}\text{a}\text{x}}}{2})H+(\frac{D}{Q})S$

$\frac{I_{\text{m}\text{a}\text{x}}}{2}$