Few general queries regarding HCP Fiori apps

Hi,

I came across few queries when i was going through Fiori apps in HCP.

1. Do we have standard fiori apps running on HCP.? or is it only on demo cloud as of now.?

2. If we are going for HCP std fiori apps, i believe we need not to deploy any apps into Hana cloud.

     Then how do we connect our gateway service to that std fiori app.? If we want to customize the app, how we are going to do.?

3. What are the pre-requisites to implement std fiori apps on cloud to a customer.?

4. How to manage the access to end users to fiori apps or fiori launchpad.?

Best Regards,

Sunil