You plan to invest $39\%$ of your portfolio in Company A with the remainder to be invested in Company B$.$ The standard deviation of Company A$\text{'}$s stock returns is $17\%.$ The standard deviation of Company B$\text{'}$s stock returns is $22\%.$ The correlation between the stock returns of Company A and Company B is $0\mathrm{.}69.$ What is the standard deviation of your portfolio's returns $($as a percentage to two decimal places$)?$Your answer should be expressed as a percentage to $2$ decimal places but do not include a percent sign. For example, if your answer is $70\mathrm{.}237\%,$ you should enter $10\mathrm{.}24.$ If your answer is $10\mathrm{.}233\%,$ you should enter $10\mathrm{.}23.$ Please do not enter your answer as a decimal, such as $0.7024$