Fred Flint has been talking to his neighbour Barney Briggs about investment options. Barney explains that he has several investment analysis models, which Fred is welcome to borrow. Fred decides to install Barney’s portfolio analysis model (see Example 3.5) and use his own historical data given in Table 4.7. He wants to find out if Barney’s model produces an answer close to the solution derived by his simple ‘what-if’ model. Use the model of Exercise