Question: How to calculate the standard deviation and the expected return for the 3 separate portfolios? Thanks. Portfolio Nr. weight stock 1 weight stock 2 weight

How to calculate the standard deviation and the expected return for the 3 separate portfolios?
Thanks.
Portfolio Nr. weight stock 1 weight stock 2 weight stock 3 weight stock 4 1 -1 0 1 1 2 -0.95 0.005 0.96 0.985 3 -0.9 0.01 0.92 0.97
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