Calculate the daily market returns for the period, variance and standard deviation in the same way as they are calculated for stocks.

1- Select four stocks from the companies listed on the Saudi Stock Exchange (Tadawul).
2- Using Excel, calculate the average return for each stock through the following steps:
Extract historical prices (closing price) for the stock for a period of 7 months (from 1/1/2022 to 31/7/2022)
Calculate the daily return rate for the stock.
Calculate the average return for the period.
3- Calculate the return and risk of the portfolio consisting of the four selected stocks (calculate the variance and standard deviation and covariance between stocks or not) by determining the investment weight in each stock from your point of view and stating the reason for that.
4- Extract the historical values of the Saudi Stock Exchange Index (TASI) for the same period.
5- Calculate the daily market returns for the period, variance and standard deviation in the same way as they are calculated for stocks.
6- Find and interpret the value of the beta coefficient for all stocks using the law. chose 4 of the most popular companies