ANNUAL DATA OF THREE STOCKS Price Price Price Return Return Return Year Stock X Stock Y Stock Z Stock X Stock Y Stock Z 30.43 52.68 24.83 0.2683 0.0558 0.4501 23.27 49.82 15.83 -0.4732 -0.1253 -0.4850 37.35 56.47 25.71 -0.4823 -0.0689 -0.8558 60.50 60.50 60.50 0.2630 -0.1038 0.4515 46.51 67.12 38.52 0.4536 0.5342 0.0577 29.55 39.34 36.36 0.3725 0.7352 0.4925 20.36 18.86 22.22 0.4618 0.5659 0.0709 12.83 10.71 20.70 Sample size: n 7 1. Compute the sample mean RETURN (r-bar) for each stock 2. Compute the sample standard deviation (s) of the RETURN for each stock