Construct the cumulative frequency distribution for the given data. Age (years) of Best Actress when award was won Cumulative Frequency Age (years) of Best Actress when award was won Frequency Less than 30 20-29 28 30-39 36 Less than 40 40-49 11 Less than 50 50-59 Less than 60 60-69 70-79 Less than 70 80-89 Less than 80 Less than 90