AccuRating has just released its webcast report for last month. The report details the aggregate tuning hours (ATHs) for the top 20 radio stations broadcast over the web. (The ATH for a station is the sum total of all hours that listeners tuned to the station.) The report displays the following histogram. Frequency 8 7 6 4 4 4 3 2 2 t] [3. 200 400 600 800 1000 1200 ATH (in thousands of hours) Based on the histogram, nd the proportion of ATE-ls in the samplj that are less than 600 thousand hours. Write your answer as a decimal, and do not round your answer. l] xe