Form a grouped frequency distribution from the following data by inclusive method taking 4 as the magnitude of class intervals. 31,23,19,29,22,20,16,10,13,34 38,33,28,21,15,18,36,24,18,15 12,30,27,23,20,17,14,32,26,25 18,29,24,19,16,11,22,15,17,10