a. Daily Life Magazine wants an analysis of the demographic characteristics of its readers. The marketing department has collected reader survey records containing the age, gender, marital status, and annual income of readers. Design an application that allows a user to enter reader data and, when data entry is complete, produces a count of readers by age groups as follows: under 20, 20–29, 30–39, 40–49, and 50 and older.
b. Modify the Daily Life Magazine program so that it produces a count of readers by gender within age group—that is, under-20 females, under-20 males, and so on.
c. Modify the Daily Life Magazine program so that it produces a count of readers by income groups as follows: under $30,000, $30,000–$49,999, $50,000– $69,999, and $70,000 and up.
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