a) Calculate the monthly rates of return for each of the securities Your calculation should be using the monthly closing stock prices from January 2008 to December 2014 published in FAME (Financial Analysis Made Easy) database. The figures in FAME have been adjusted based on the stock split/dividend ratio. (Note: Students are required to learn how to use FAME database to extract the required financial information). You can use Microsoft Excel functions to expedite your calculation, but please show the mathematical formula used. Please show rates of return up to three digits after decimal point. For example, 0.000 instead of 0.000%. (8 marks)

GSK: Glaxosmithkline PLC (Reg. no: 03888792). It manufactures various pharmaceutical products. BAT: British American Tobacco PLC (Reg. no: 03407696). The holding company owns, directly or indirectly, investments in the numerous companies constituting the British American Tobacco Group activities include the manufacture, distribution or sale of tobacco and nicotine products.