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

Toyota Corp's stock is $$35$ per share. Its expected return is $22\%$ and variance is $12\%.$ Honda Corp's stock is $$18$ per share. Its expected return is $16\%$ and variance is $8\%.$ Benz Corp's stock is $$48$ per share. Its expected return

is $10\%$ and variance $8\%.$ The covariance between Toyota and Honda is $0\mathrm{.}06.$ 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 $14\mathrm{.}256\%.$