Postage rates Assume that postage for sending a first-class letter in the United States is...

Postage rates Assume that postage for sending a first-class letter in the United States is $0.42 for the first ounce (up to and including 1 oz) plus $O. 17 for each additional ounce (up to and including each additional ounce).

a. Graph the function p = f(w) that gives the postage p for sending a letter that weighs w ounces if 0 < w ≤ 5.

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b. Evaluate

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c. Interpret the limits exist? Explain.

d. Does