Year Murray Ltd Robert Ltd Return % Return % 2009 10 20 2010 12 6 2011 5 10 2012 13 12 You are required to: 1.1 Calculate the expected return and standard deviation for Murray and for Robert. (12 marks) 1.2 Calculate the covariance between Murray and Robert. (4 marks) 1.3 Calculate the coefficient of variation for each company and determine which company is riskier. (3 marks) 1.4 Calculate the correlation coefficient and describe the correlation of returns between Murray and