Six hundred adult Americans were asked by telephone poll

Six hundred adult Americans were asked by telephone poll, “What do you think constitutes a middle-class income?”The results are in Table 2.69. Also, include left endpoint, but not the right endpoint.Salary ($) Relative Frequency20,000–25,000 0.0925,000–30,000 0.1930,000–40,000 0.2640,000–50,000 0.1850,000–75,000 0.1775,000–99,999 0.02100,000+ 0.01Table 2.69a. What percentage of the survey answered “not sure”?b. What percentage think that middle-class is from $25,000 to $50,000?c. Construct a histogram of the data.i. Should all bars have the same width, based on the data? Why or why not?ii. How should the d. Find the 40th and 80th percentilese. Construct a bar graph of the data