Hi can you please explain this to me.

Question 3. The following table shows a study involving interviewees who were asked to provide information about how much they spend on their phone bill each month. Cumulative Cumulative Cumulative Relative Percentage Phone Bill Frequency Frequency Frequency Frequency $0 to s$15 26 26 0.130 13.0 >$15 to $$30 40 66 0.330 33.0 >$30 to s$45 34 100 0.500 50.0 >$45 to s$60 28 128 0.640 64.0 >$60 to s$75 13 141 0.705 70.5 >$75 to $$90 28 169 0.845 84.5 >$90 to s$105 17 186 0.930 93.0 >$105to s$120 14 200 1.000 100.0 Total 200 1. How many categories do we have? 2. How many people did we interview? 3. How many people are there who spend between $45 and $75 per month? 4. What is the fraction of people who spend between $30 and $45 per month among all interviewees? 5. What is the fraction of people who spend $60 or less per month among all interviewees