A stock is expected to return $11\%$ in a normal economy, $19\%$ if the economy booms, and lose $8\%$ if the economy moves into a recessionary period. Economists predict a $45\%$ chance of a normal economy, a $45\%$ chance of a boom, and a $10\%$ chance of a recession. What is the expected return on the stock?

$17\mathrm{.}20\%$

$12\mathrm{.}70\%$

$12\mathrm{.}07\%$

$10\mathrm{.}27\%$