Lawson, Incorporated had $8,000$ shares of $$4\mathrm{.}20$ cumulative preferred stock, and $60,000$ shares of common stock outstanding throughout the year. During the year, the company declared a dividend of $$4\mathrm{.}20$ per share on its common stock and its income statement showed net income of $$550,000.$ Earnings per share of common stock amounted to $($round your answer to two decimal points$)$:

a$.$ $$4\mathrm{.}20.$

b$.$ $$8\mathrm{.}09.$

c$.$ $$8\mathrm{.}61.$

d$.$ $$9\mathrm{.}17.$