About function about Appointments +

I bought the wordpress plugin Appointments +. I have some questions about the plugin.

When a viewer sent the booking request, can the plugin send the confirmation email to a viewer and administrator automatically?

Also if I set up the minimal time range as 15min and an appointment needs more than 15min (for example 45min), do I need to put the 3 appointments from background? Can I put 45min appointment at one time?

Thank you