NLB Multiple HTTPS sites - How Many IP Address Do I Need

I have been asked to setup NLB unicast for SharePoint 2013 farm with 2 WFE and 2 Web Applications using SSL/HTTPS.

I know with Unicast, you need two NIC, one for management and one for the cluster node.

I know at an IIS level I will need a unique IP address for each Web Application.

How many Cluster IP (VIP) will I need for the two Web Applications?

Do I need a unique IP for the Cluster IP each FQDN of the web app or can I one Cluster IP and map it to several FQDN (Web App URL)?

2 IP - Management 4 IP - IIS Binding (1 ip * 2 (web app https) * 2 (number of WFE servers)) ? IP - Cluster IP