The postal service of a country charges $0.36 postage for a letter weighing up to 1 ounce, plus $0.23 for each additional ounce up to 5 ounces. Letters weighing more than 5 ounces do not qualify for these rates. (a) Write a piecewise-defined function C for the postage charged for a letter weighing x ounces. if 0

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