ITIL Availability Management aims to define, analyze, plan, measure and improve all aspects of the availability of IT services. It is is responsible for ensuring that all IT infrastructure, processes, tools, roles etc are appropriate for the agreed availability targets.
Since they can do 19 programs in 19 hours, Then 52 programs in 52 hours respectively. And a 15 min interval Total time they take to do 52 programs is 52 hours 15 minutes.