Update supported-kubernetes-versions.md

Add new FAQ sections as well as get rid of 1.17x on the chart.

Author: qpetraroia

articles/aks/supported-kubernetes-versions.md

@@ -136,7 +136,6 @@ For the past release history, see [Kubernetes](https://en.wikipedia.org/wiki/Kub
 
 |  K8s version | Upstream release  | AKS preview  | AKS GA  | End of life |
 |--------------|-------------------|--------------|---------|-------------|
-| 1.17  | Dec-09-19  | Jan 2019   | Jul 2020  | 1.20 GA | 
 | 1.18  | Mar-23-20  | May 2020   | Aug 2020  | 1.21 GA | 
 | 1.19  | Aug-04-20  | Sep 2020   | Nov 2020  | 1.22 GA | 
 | 1.20  | Dec-08-20  | Jan 2021   | Mar 2021  | 1.23 GA |
@@ -184,6 +183,14 @@ To upgrade, from *1.12.x* -> *1.14.x*, first upgrade from *1.12.x* -> *1.13.x*,
 
 Skipping multiple versions can only be done when upgrading from an unsupported version back into a supported version. For example, upgrade from an unsupported *1.10.x* --> a supported *1.15.x* can be completed.
 
+**Can I create a new 1.xx.x cluster during its 30 day support window?**
+
+No. Once a version is deprecated/removed, you cannot create a cluster with that version. As the change rolls out, you will start to see the old version removed from your version list. This process may take up to a week.
+
+**I am on a freshly deprecated version, can I still add new node pools? Or will I have to upgrade?**
+
+No. You will not be allowed to add node pools to your cluster running a deprecated version. You will have to upgrade.
+
 ## Next steps
 
 For information on how to upgrade your cluster, see [Upgrade an Azure Kubernetes Service (AKS) cluster][aks-upgrade].