You are given the following scenario: The current market price of a share is R$100.$ The expected dividend per

share is R$5.$ The dividends are expected to grow by $10\%$ per annum. Calculate the cost of equity by using the

constant growth model? Set your calculator to four decimal places for calculations and show your final answer as

a percentage.

$($a$)15\%$

$($b$)10\%$

$($c$)20\%$

$($d$)5\%$