Using the data from Table 11.3, what is the covariance between the stocks of American Air Lines

Question:

Using the data from Table 11.3, what is the covariance between the stocks of American Air Lines and Delta Air Lines?

Stocks
Stocks or shares are generally equity instruments that provide the largest source of raising funds in any public or private listed company's. The instruments are issued on a stock exchange from where a large number of general public who are willing...