A firm has an ROE of $20\%$ and a market$-$to$-$book ratio of $2\mathrm{.}52.$ Its $\frac{P}{E}$ ratio is

Multiple Choice

$7\mathrm{.}94$

$12\mathrm{.}60$

$17\mathrm{.}48$

$50\mathrm{.}40$