How to get propsed parent position incumbent in Fusion Workflow(Request for position change)

Summary

Starting and Top participant expression for Proposed parent postion's incumbent and the parent

Content

In the request for position change workflow, need to send approval request for Proposed parent position incumbent AND parent of parent position's incumbent. Need start and top participant expression for the same. Attached screenshots for reference. Appreciate your help. Thank you.

Version

R13 20D