What is the variance of each of the following portfolio

week 1 price(purchase price) wk2price wk3price wk4price wk5price wk6price (selling price)

P1: 100 shares $47.55 $47.03 $48.83 $45.09 $44.85 $45.31

100 shares $60.77 $60.37 $59.35 $59.51 $59.75 $60.24

100 shares $199.27 $193.94 $193.61 $193.97 $193.14 $194.48

100 shares $136.66 $136.93 $133.13 $133.81 $134.07 $135.83