4. An investor sets up a portfolio based on the following buy and sell short activity: Bought stock A for $20K. Bought stock B for $15K. Bought stock C for $25K. Bought stock D for $40K. Short sold stock E and collected $50K cash. (a) What is the value of the portfolio at time t = 0? (b) Calculate the relative weights of each stock in the portfolio. A year later, the investor liquidated the portfolio by selling stocks A, B, C, D for $25K, $20K, $24K, and $42K, respectively, and paid $52K to close the short sale. (c) Find the individual rate of return of each stock. (d) Find the annual rate of return of the portfolio using the results in parts (b) and (c). (e) Find the value of the portfolio when sold a year later, use it to compute the annual rate of return of the portfolio, and compare with the result in part (d). 4. An investor sets up a portfolio based on the following buy and sell short activity: Bought stock A for $20K. Bought stock B for $15K. Bought stock C for $25K. Bought stock D for $40K. Short sold stock E and collected $50K cash. (a) What is the value of the portfolio at time t = 0? (b) Calculate the relative weights of each stock in the portfolio. A year later, the investor liquidated the portfolio by selling stocks A, B, C, D for $25K, $20K, $24K, and $42K, respectively, and paid $52K to close the short sale. (c) Find the individual rate of return of each stock. (d) Find the annual rate of return of the portfolio using the results in parts (b) and (c). (e) Find the value of the portfolio when sold a year later, use it to compute the annual rate of return of the portfolio, and compare with the result in part (d)