All numbers are in raw decimal form. Chunxiao is investing in stocks. X and Y. which have expected returns of 0.15 and 0.21 respectively. Their return variances are 0.041 and 0.026 respectively and the correfifion between their returns in 0.24. The risk-free rate is 0.06. Chunxiao has decided to borrow an amount equal to 50% of her wealth and then invest both her own funds and the borrowed funds in securities X and Y. putting 20% into security X and 80% into security Y. What is the standard deviation of the return on Chunxiao portfolio (in raw decimal form)?