Chocolate bar sales

This task is about creating a stem-and-leaf graph.
Andre's school is raising money by selling chocolate bars.
He wrote down the number of chocolate bars each person in his class has sold.

Here are Andre's results:
 

25, 2, 12, 7, 0, 41, 10, 18, 15, 11, 34, 18,
21, 12, 9, 13, 16, 22, 8, 37, 4, 52, 16, 0
 
a)
 
 
 
 
Complete the stem-and-leaf graph using Andre's results. The 'stem' has been done for you.
Record the 'leaves' in the order that they appear in the box above.
 
 
 

 
b)
 
 
Now complete the stem-and-leaf graph below by ordering the numbers in each of the leaves from part a).