Minimum variance

[acemeister]

Hi,

I have a problem with minimum variance in a porfolio of three assets. I know how to do it with two assets, but with three assets i cant figure it out! this is due to that I suck at math:)
Could somebody help me with that, since i have a test in that tommorrow! i uploaded one old test, so if someone could help me with the task 2 c!

ps remember i suck at math so please show me step by step!


Thank you!