I know this is not the forum to put up my question, but most of the people can
help me out.

I have an infopath form that has three sections. First section is fill by first
person. Second section by second person and the third section by third person.
When the first person fills his section and clicks the first submit button it
emails the form to second person. When the second person fills his section and
clicks the second submit button, it should email the form to third person.
When the third person fills his section and clicks the third submit button, it
should email to the final concern person.
How do i set up this workflow for a business process. On submit button i am able
to provide only one email address.
I'm not able to set up different email address for different submit button.