oyota Corp's stock is $$35$ per share. Its expected return is $25\%$ and variance is $10\%.$ Honda Corp's stock is $$22$ per share. Its expected return is $16\%$ and variance is $9\%.$ Benz Corp's stock is $$45$ per share. Its expected return is $10\%$ and variance $8\%.$ The covariance between Toyota and Honda is $0\mathrm{.}08.$ What would be the standard deviation of a portfolio consisting of $50\%$ Toyota and $50\%$ Honda?