Give a company summary of SP500and MRK stock

2. Download the last year daily close prices for SP500 index from yahoo finance

https://finance.yahoo.com/quote/%5EGSPC?p=%5EGSPC

3. Download the last year daily close prices for MRK from yahoo finance

https://finance.yahoo.com/quote/MRK?p=MRK

4. Import daily close values into excel and compute

a. Log return

b. Expected return

c. Variancetheoretical mean zero variance formula

d. Standard deviation

e. Covariance theoretical formula and Excel COVAR function

i. Comment on the covariance measurement