Whenever the Account on Contact record changes, the contact should be

converted back to a Lead. Mapping from Contact to Lead fields provided below.

2. Delete any contact roles associated with open opportunities for the contact with the

old account

3. Send a plain text email to the Opportunity owner notifying the owner about the

change unless the user who changed the Account value is the same as the

Opportunity owner.

4. Add a button on the Contact detail page to un-convert a contact back to lead on

demand regardless of Account change. (If the Opportunity owner was the user

who clicked the button, do not send any emails)

5. Delete the contact

please any one help the scenario