Question $9,$ P $12-18($similar to$)$

You have a portfolio with a standard deviation of $25\%$ and an expected return of $17\%.$ You are considering adding one of the two stocks in the following table: $.$ If after adding the stock you will have $25\%$ of your money in the new stock and $75\%$ of your money in your existing portfolio, which one should you add?

Standard eviation of the portfolio with stock $A$ Is

Standard eviation of the portfolio with stock b is

$.($Round to two decimal places.$)$