Scanlon Inc.$\text{'}$s CFO hired you as a consultant to help her estimate the cost of capital. You have been provided with the following data: $rRF=4\mathrm{.}10\%$;$R{P}_M=5\mathrm{.}60\%$ and $b=0\mathrm{.}60.$ Based on the CAPM approach, what is the cost of equity from retained earnings?

a$.9\mathrm{.}70\%$

b$.5\mathrm{.}82\%$

c$.10\mathrm{.}30\%$

d$.7\mathrm{.}46\%$

e$.8\mathrm{.}06\%$