$12.$ NGN Enterprise paid a dividend last year of $$3\mathrm{.}25,$ which is expected to grow at a constant rate of $7\%.$ NGN has a beta of $1\mathrm{.}5$ and their stock is currently selling for $$62.$ If the market risk premium is $6\%$ and the risk$-$free rate is $3\%,$ should you purchase NGN$\text{'}$s stock? $($Justify your answer. No Justification, No Point.$)$

a$.$ No$,$ because it is overvalued $$7\mathrm{.}55$

b$.$ Yes, because it is undervalued $$7\mathrm{.}55$

c$.$ No$,$ because it is overvalued $$18\mathrm{.}95$

d$.$ Yes, because it is undervalued $$18\mathrm{.}95$