Use Yahoo Finance to download the monthly closing price for Apple's stock (AAPL) for at least 13 months back. Then do the same for the S&P 500 index (^GSPC), and the 13 Week Treasury Bill index (^IRX).
a. Calculate the monthly excess returns for Apple and the S&P 500 index over at least 12 months and show the average excess returns for each.
b. What is the beta of Apple?
c. What is the alpha of Apple?

d. What is the standard error for Apple's beta?

e. What is the 95% confidence range for Apple's beta?