What is the Standard deviation of this portfolio?<br/> week

1 price(purchase price) wk2price wk3price wk4price wk5price wk6price (selling price)
P3: 100 shares $100.44 $103.29 $103.44 $100.73 $98.58 $99.63
100 shares $49.52 $51.71 $55.34 $55.28 $53.46 $53.74
100 shares $29.64 $28.78 $29.72 $29.00 $29.76 $29.68
100 shares $43.96 $43.46 $41.77 $42.25 $43.03 $44.33

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