Kevin watches a concert at the theatre. The concert ends at 8:40 pm.
It takes Kevin 22 minutes to get from his seat in the theatre to the train station.
Trains to Kevin's home leave the train station at the following times:
19:15
20:15
20:35
21:15
21:35
22:15
22:35

a)
Write down the time of the earliest train that Kevin can catch.

b)
How long will Kevin have to wait at the train station for, if he catches the
earliest possible train?