How to Upgrade existing Odata Service to Odata V4 Version?

hi to all ,

i have following queris can anybody help me

i want to Upgrade my existing OData Service (V2) to V4 Odata Version how can i achieve it.

is there any SAP provided Tool Exist to perform above operation?

does New ABAP programming model provides end-2-end suport for Odata V4?

if answer is Yes then,

from which Netweaver version onwards it is avilable?