The returns on the common stock of Cycles, Inc. are quite cyclical. In a boom economy, the stock is expected to return $20$ percent in comparison to $13$ percent in a normal economy and a negative $20$ percent in a recessionary period. The probability of a recession is $30$ percent, while the probability of a boom is $5$ percent. The probability that the economy will be at normal levels is $65$ percent. Assume you have already calculated the Expected Return on this stock as $3\mathrm{.}45\%$ or $\mathrm{.}0345.$ What is the standard deviation of the return on this stock?