Quick tutorial on how to run Multiple regression in R

A quick tutorial on how to run Simple linear regression in R. Below is the link to the data use in this tutorial
drive.google.com/file/d/1BpQ1...

[@CanDoSo_org]

Thanks. Could you please attache the data you used?

[@emmanuelpatrickiwe6594]

drive.google.com/file/d/1BpQ1HroMCopsExYEVttIs1YBPykZHFiv/view?usp=drivesdk

[@balogunhameed4968]

I didn't get the function you used after adding smoking to get the multiple regression