I asked this queastion pleviously put the answer is too short and not completed ,

please do not use handwriting and please write all the details and process steps that i used to solve this question .

It is required to find the value of the beta coefficient for the stock of each of the aforementioned companies, showing how to calculate it.

You have the following data regarding the shares of three companies (National Telecom Company, National Metal Company, National Food Company)

the information

National Telecom Company

National Metal Company

National Food Company

link

0.7

0.8

0.85

The standard deviation of the arrow

0.048

0.039

0.022

Market standard deviation

0.021

0.021

0.021