Given that the water bills (in Rs) of $$32$$ houses in a certain street for the period 1.1.98 to 31.3.98 are below $$56,43,32,38,56,24,68,85,52,47,35,58,63,74,27$$ $$84,69,35,44,75,55,30,54,65,45,67,95,72,43,65,35,59$$ Tabulate the data  Class interval frequency cumulative frequency 20-29 30-39 40-49 50-59 60-69 70-79 80-89 90-99 2 6 5 7 6 3 2 1 2 8 13 20 26 29 31 32