Download market indices (for example, S&P 500 indices) for the same period(2018.9.1-2023.8.31) and same frequency with the Apple and Microsoft . Calculate daily log retuns for market indices and convert themto annualised returns. Using the annualised caily stock returns, annualised daily retuns for market indices, and the risk-free rate series for five years (from 1sSeptember 2018 to 31* August 2023), estimate a beta() for the two stocks using the OLS regression. Interpret the results.