Need to file Past 3 years.

I have not filed the Last 3 years of my taxes. I know @2 of them would be simple filing but 2025 I had Marketplace insurance and I have to add the File I received from them dealing with tax credits. 

 

1.) Can I still use the free filing option for all 3?

2.) If the free filing option is not available for all 3, what would it cost just to have someone do all 3?