Use the following information to answer the next $4$ questions.

Jumanji Corp. has $120,000$ preferred shares which currently sell for $$91$ each and pay an annual dividend of $$6\mathrm{.}80.$ They also have $220,000$ common shares which sell for $$55\mathrm{.}25$ per share and they just paid an annual dividend of $$2\mathrm{.}30$ per share. The common share dividends are expected to grow by $4\mathrm{.}10\%$ each year in perpetuity. Jumanji has $11,000$ bonds with a face value of $$1,000$ each. The bonds pay $6\mathrm{.}10\%$ annual coupon and will mature in $30$ years and currently sell at $102\%$ of face value. The company's tax rate is $36\%.$

What is the required rate of return on the preferred shares?

a$)7\mathrm{.}43\%$

b$)7\mathrm{.}47\%$

c$)7\mathrm{.}36\%$

d$)7\mathrm{.}39\%$

e$)7\mathrm{.}49\%$