please help!

A$-$Rod Manufacturing Company is trying to calculate its cost of capital for use in making a capital budgeting decision. Mr$.$ Jeter,

the vice president of finance, has given you the following information and has asked you to compute the weighted average

cost of capital.

The company currently has outstanding a bond with a $11\mathrm{.}2$ percent coupon rate and another bond with an $8\mathrm{.}8$ percent rate. The

firm has been informed by its investment banker that bonds of equal risk and credit rating are now selling to yield $12\mathrm{.}1$ percent.

The common stock has a price of $$66$ and an expected dividend $(D_1)$ of $$1\mathrm{.}86$ per share. The historical growth pattern $(g)$ for

dividends is as follows:

$$1\mathrm{.}41$

$1\mathrm{.}55$

$1\mathrm{.}70$

$1\mathrm{.}86$

The preferred stock is selling at $$86$ per share and pays a dividend of $$8\mathrm{.}20$ per share. The corporate tax rate is $30$ percent.

The flotation cost is $2\mathrm{.}5$ percent of the selling price for preferred stock. The optimum capital structure for the firm is $20$ percent

debt, $10$ percent preferred stock, and $70$ percent common equity in the form of retained earnings.

a$.$ Compute the average historical growth rate.

Note: Do not round intermediate calculations. Round your answer to the nearest whole percent and use this value as $g.$

Input your answer as a whole percent.