A local Pennysaver charges $11 for each of the first three lines of a classified ad, and

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A local Pennysaver charges $11 for each of the first three lines of a classified ad, and $5 for each additional line.
a. What is the price of a two-line ad?
b. What is the price of a five-line ad?
c. If x is the number of lines in the ad, express the cost c(x) of the ad as a piecewise function.
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