Climbing the wall

This task is about interpreting a line graph.

Snail's progress up a wall

This graph shows a snail's progress as it climbed up a wall. Sometimes the snail was climbing and sometimes it was resting.

 
a)
 
How far did the snail climb in the first minute? __________ cm
 
b)
 
How far had the snail climbed after 8 minutes? __________ cm
 
c)
 
How far from the top of the wall was the snail after 11 minutes? __________ cm

d)

How long did the snail stop for during its climb of the wall? __________ minutes
 
e)
 
If the snail had kept climbing at the same rate without resting, how long would it have taken to climb the wall?
 
__________ minutes