Sir, the tooth no 6 needs extraction, then you can go for implants or bridge connecting 5 and 7. And for placing bridge 7 needs to treated first.
The tooth no 7 needs re RCT, and it will take time for healing.
Next Steps
Please visit an Endodontist
Health Tips
Tooth no 6 needs extraction, as the damage is more.
Hope this helps you sir.