What is the standard deviation for the portfolio?

Portfolio: Ending price = Apple: 151.28; Microsoft 336.06; Netflix 681.17; Airbnb 201.62 Name Initial Price Shares Percentage of $100,128 invested Apple: 148.60 (221 Shares) = (32.85%) (money invested= $32,840) Microsoft 299.72 (15 Shares) = (28.39%) (money invested= $28,474) Netflix 558.92 (37 Shares) = (21.18) (money invested $21,238) Airbnb 154.18 (114 Shares) = (17.58%) (money invested $17,576) - 7) Calculate standard deviation for the portfolio (during investment time period)