Exercise 1. Imagine you have 500 dollars you want to invest for two periods. Swift corporation's stock is currently selling for S10. In each of the two periods, the stock price could either go up one dollar or down one dollar with equal probability $12 50% $11 50% 50% $10 $10 50% 50% $9 50% $8 a Suppose you invest all S500 dollars in the stock. How many shares to you have? How much money do you have at each final node? What is the expected value of your investment after the two periods? What is the variance of your investment after two periods? b Suppose that you invest $1000 dollars in the stock using your margin account. How many shares to you have? How much money do you have at each final node? What is the expected value of your investment after the two periods? What is the variance of your investment after two periods? c Comment on the two investing options