Refer to Exhibit $4\mathrm{.}1.$ What is the firm's market$-$to$-$book ratio? Do not round your intermediate calculations.O a$.1\mathrm{.}15$O b$\mathrm{.}1\mathrm{.}23$O c$.1\mathrm{.}27$O d$.1\mathrm{.}04$O e$.1\mathrm{.}39$