Working with time

This task is about working out time.
 
 
a) Jane did her violin practice from 2:40 p.m. until 3:10 p.m.
 
  i) Show her start and finish times on the clocks below.
 
 
          
 
 
  ii) How long did Jane practice for? ____________________
 
b) The clocks below show when Katie started and finished her art class.
 
 
         

 
  i) Show her start and finish times on the digital clocks below.
 
   
 
Start
  

 
Finish

 
  ii) How long was Katie's art class for? ____________________