RHEL Workstation EOL Question

Hello All

Sorry to ask such a basic question but can someone please tell me when red hat 7.2 workstation reaches end of life, i have a lenovo p50 with hybrid graphics or i can switch to discrete quadro m2000m and my laptop is certified for RHEL 7.2.

When does RHEL 7.2 workstation expire ?

Also

If i install 7.2 is it just going to update to 7.4 anyway ?

Currently have 7.4 installed

My reasoning for rolling back is hopefully graphics driver stability and kernel stability the latest 3.10 kernel seems be a bit buggy.

Kind Regards

Ryan