Assume that the economy has an $30\%$ chance of booming, a $30\%$ chance of being normal, and being recessionary the remainder of the time. A stock is expected to return $24\mathrm{.}7\%$ in a boom, $11\%$ in a normal economy, and $-10\mathrm{.}42\%$ in a recession. What is the expected return on the stock?