Suggestions to Upgrade VMware Certification : VCP 510, 410, 310 , VCP Cloud?

Hi Team,

I got the email from VMware that my listed below VMware certifications are expiring on 27th Sept 2015.

1. VMware certified Professional - Cloud
2. Vmware Certified Professional 5 - Data Center Virtualization
3. VMware certified Professional 4 - Data Center Virtualization
4. VCP on VMware Infrastructure 3

Questions:-

1. Do i need to upgrade all of these exams, if Yes, what is the path?

2. Is there any free / discount benefit available to upgrade these Exams

3. Is there any Track available as - VMware certified Professional 6 - Data center Virtualization?

I would like to go with VCP6-Cloud approach, any way i can upgrade above exams and at same time get the new certification in place i.e. VCP 6-Cloud.

Thanks

Deepak