​​​ a. Download stock prices for any two different companies – 5 years of monthly closing prices for each company. You can use any database to obtain the prices e.g. datastream, yahoo finance (click the Investing tab followed by the Historical Prices tab) etc. Use data from December 2008 to December 2013 to generate average monthly returns. Calculate the annualised mean return, standard deviation and correlation of the stocks. b. Use investment proportions for the two stocks ranging from 0% to 100% using intervals of 5%. Tabulate the investment opportunity set of the two stocks.