In a village, there are 570 people who have cell phones. An NGO survey their cell phone usage. Based on this survey a histogram is drawn. Answer the following questions.

(i) How many people use the cell phone for less than 3 hours?

(ii) How many of them use the cell phone for more than 5 hours?

(iii) Are people using cell phone for less than 1 hour?

(iv) Give your suggestions on the data.