You may attempt this question $2$ more times for credit.

Toyota Corp's stock is $$32$ per share. Its expected return is $22\%$ and variance is $15\%.$ Honda Corp's stock is $$23$ per share. Its expected return is $19\%$ and variance is $4\%.$ Benz Corp's stock is $$48$ per share. Its expected return is $11\%$ and variance $8\%.$ The covariance between Toyota and Honda is $0\mathrm{.}03.$ What would be the standard deviation of a portfolio consisting of $50\%$ Toyota and $50\%$ Honda?

Place your answer in decimal form, for example, as $0\mathrm{.}14256$ and not in percent form such as $14\mathrm{.}256\%.$