Merging multiple .bak files in SQL Server

Question

I have a database named Bibek. I have created multiple backups for this database by updating the value of the records present inside the database for different table.

For e.g - Bibek1.bak, Bibek2.bak, Bibek3.bak

Now I want to merge all those .bak files to create one single .bak file named BibekFinal which has all the updates from all the above 3 .bak files .

Please help me on this. I am new to SQL Server .