Fetch Request stakeholders, Request path, Request relationships

Hello,

I need to fetch information using API, but I am unable to find 

1. Request Stakeholder - Primary contact and Requested By

2. Request Path - path

3. Request Relationships - Resolved By.

How do I get these informations?

https://veridiancu.my.workfront.com/attask/api/v18.0/proj/61940310002d01....................?fields=*,owner,sponsor,portfolio,group,program,actualDurationExpression,durationExpression,workRequired,actualWorkRequired,parameterValues,company,resourceManagerscom&sessionID=97223b45818f..............