Prepare a frequency distribution by inclusive method

Prepare a frequency distribution by inclusive method taking class interval of 7 from the following data
28,17,15,22,29,21,23,27,18,12,7,2,9,4,6,1,8,3,10,5,20,16,12,8,4,33,27,21,15,9,3,36, 27,18,9,2,4,6,32,31,29,18,14,13,19,15,11,9, 7,1, 5,37,32,28,26,20,20,19,25,20

The frequency distribution by inclusive method of given data is shown below