Hey i need help with this problem! If you can provide an explanation on how you got the answer thatd help me a lot!

Using the data in the following table, and the fact that the correlation of A and B is -0.08 , calculate the volatility (standard deviation) of a portfolio that is 80% invested in stock A and 20% invested in stock B. (Click on the following icon in order to copy its contents into a spreadsheet) The standard deviation of the portfolio is \%. (Round to two decimal places)