a) We enjoy playing football, volleyball and other sports. We also enjoy doing something with frinds.
b) We can do the things we really enjoy after school and at the weekends, but during the day we have school, so we can't do the things we enjoy during the day.
We can do it only after school or at the weekends but it isn't very tragically, that we can do it all the time.
Text in Picture:
You also burn calories while sitting in the chair!

myclimate.org