Need help building a 2 approval workflow

Come someone please provide a template or detailed instructions on how to accomplish a worklow as listed below? I am looking to build a 2 step approval workflow.

 Customer submits a form

- Manager A receives it via email and reviews the entry

- Manager A confirms and approves it by editing the submission and re-submitting it

- Manager B (or someone else) receives another email after Manager A's approval

- Manager B receives it via email and reviews the entry

- Manager B confirms and approves it by editing the submission and re-submitting it

- Customer  receives a confirmation email about the approval

The following thread has some great information on how to create an approval workflow:

https://www.jotform.com/answers/742263-How-to-create-an-approval-workflow

One of the screenshots might be a bit outdated but the concept is the same.

If you have any questions about specifics, let us know and we will be happy to help.