AAA Inc.$\text{'}$s stock has a $40\%$ chance of producing a $36\%$ return, a $40\%$ chance of producing a $10\%$ return, and a $20\%$ chance of producing a $-28\%$ retur. What is the firm's expected rate of return? Do not round your intermediate calculations.

O a$.15\mathrm{.}71\%$

O b$.12\mathrm{.}01\%$

$.15\mathrm{.}86\%$

$$ d$.14\mathrm{.}01\%$

$0$ e$.12\mathrm{.}80\%$