a company has a dividend growth rate of $6\%,$ the expected retention is$6\mathrm{.}5\%$ and the equity required rate of retunr is $10\mathrm{.}5\%,$ the expected p$/$e ratio is closest to$?$ a$)18\mathrm{.}23,$ b$)7\mathrm{.}78,$ c$)14\mathrm{.}44,$ d$)17\mathrm{.}14?$