Maths test scores

This task is about recording data on a stem-and-leaf graph.
The Year 8 students at Kaimoana School sat a maths test. The teachers wanted to compare the test scores for two classes on a back-to-back stem-and-leaf graph.
 
a)

Your teacher will read out the scores. You are to display this data as you hear it onto the back-to-back stem-and-leaf graph below.
The stem of the graph has been done for you.
  

Room 5
  Room 7
 
 

b)
 
Now complete the back-to-back stem-and-leaf graph below by ordering the numbers in each of the 'leaves' from part a). Make your graph as neat as possible.     
 
Room 5
  Room 7
 
 
 
Use your graph to answer the following questions.
 
c) 
i)  What is the median score for Room 5? __________
 
ii) What is the range for Room 5? __________
 
d)
i)  What is the median for Room 7? __________
 
ii) What is the range for Room 7? __________