25 20 Frequency Density 15 10 5 0 10 20 30 40 50 60 Travelling time in minutes The histogram above shows the time taken to comute to work for the employees of a large company 1. How many people take between 35 and 45 minutes to get to work? 2. How many people take less than 20 minutes to get to work? 3. What is the frequency of the modal class? 4. Fifty people from another town join the company. It takes them between 60 and 70 minutes to comute. An extra bar is added to the histogram above. What frequency density will the height of this bar represent