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Given the six years of percentage linear return from Stock 1, 2 and 3 in the following table Year Stock 1 return Stock 2 return Stock 3 return 2013 0.10 0.20 -0.05 2014 -0.15 -0.20 -0.3 2015 0.20 -0.10 0.25 2016 0.25 0.30 -0.1 2017 -0.30 -0.20 0.4 2018 0.20 0.60 0.15 1. Calculate the unbiased estimates for the 3 x 1 vector of expected returns Ho and the 3 x 3 variance-covariance matrix V