2. (35 points) Consider the stock return data for Apple Computer (APPL), Advanced Micro Devices (AMD), and Oracle Corporation (ORCL) provided below. Scenarios (Years) Stock Year 1 Year 2 Year 3 AAPL -39.80 10.10 124.89 Year 4 151.84 Year 5 Year 6 *Year 7 Year 8 -58.33 14.34 -41.91 57.10 AMD -42.52 ORCL -10.19 13.56 56.93 137.89 170.64 36.67 -34.76 -67.35 183.59 6.33 16.57 -40.73 -30.30 15.21 -0.65 a. Develop the Markowitz portfolio model for these data with a required expected return of 25 percent. Assume that the eight scenarios are equally likely to occur. b. Solve the model developed in part (a). c. Vary the required return in 1% increments from 25% to 30%, and plot corresponding variance (y) over return (x). d. What does the plot you've developed in part (c) show?