https://www.coursehero.com/file/20999112/Corporate-Finance-10th-edition-Case-Solutions/?justUnlocked=1#/question

Hi, I was wondering in excel what numbers am I supposed to plug in order to calculate portfolio standard deviation. I figured out Portfolio E(R), but can solve how the numbers for Portfolio standard deviation can be solved for on excel, or just using these numbers. (the problem is on pg 42, #3. It's been solved, again want to know how the number was calculated. I been using formula, but don't come to those numbers)