Approve and forward

We are R121.3 and have a generic question on the Approve & Forward functionality in Purchasing: We are using Employee / Supervisor hierarchy for approvals. no AME.

1. Can one employee forward the approval notification to another who is not in the hierarchy?
2. Ex if the requestor's manager is having approval limit of $100 and forwards the requisition of $1000 to another person (John) who is not his manager and if John has an approval limit of $500/, once John approves it, will the requisition goes to the manager of requestor or goes to the manager of John for approval?
3. Say of John has the approval limit of $1000/- or above, will the requisition gets approved and converted to PO?