Construct the cumulative frequency distribution for the given data Age (years) of Best Actress when award was won Frequency 20-29 30-39 40-49 50-59 60-69 70-79 1 80-89 NNNN or Age (years) of Best Actress when award was won Cumulative Frequency Less than 30 Less than 40 em Less than 50 Less than 60 10 Less than 70 Less than 80 1 of Less than 90 1 O of 2