Could anyone show me how to solve this problem?

Could anyone show me how to solve this problem? I have tried more than 3 times, but I have got some of it wrong. Thanks. 

The question is. How to set a frequency distribution using 7 classes for the data set, the 7 classed could be from the following?

1      3    4     5    2     7

8     10  12  12  12  12 

12   12  17  13  19  33

21   23   25  25  35  30 

31   19   28  25  17  35

Check all that apply.

31-35  ______

1-5       ______

11-15  ______

13-16  ______

25-28  ______

5-8      _______

26-30 _______

21-25 _______

1-4      _______

16-20 _______

9-12   _______

21-24 _______

6-10   _______

17-20 _______