E WAY BILL URGENT QUERY

When the job work goods received back from the job worker by the supplier
1).what is the value of such goods in e way bill? It is same as value of goods at time of senting the goods to job worker?
2). For e way bill generatation job worker can generate e way bill?
3).what to enter in the GSTN coloumn of e way bill generated by the supplier if the job worker is unregistered?
4). Job work charge is required to consider for e way bill generation in case of goods received back from the job worker?
5).for e way bill for job work is any tax amount is required to mention in delivery challan? Or it is zero?