Admission prices: At Wet Willy’s Water World, infants under 2 are free, then admission is charged according to age. Children 2 and older but less than 13 pay $2, teenagers 13 and older but less than 20 pay $5, adults 20 and older but less than 65 pay $7, and senior citizens 65 and older get in at the teenage rate. (a) Write this information in the form of a piecewise-defined function. Include the domain for each piece. Then (b) sketch the graph and find the cost of admission for a family of nine which includes: one grandparent (70), two adults (44/45), 3 teenagers, 2 children, and one infant.
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