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(6 pts.) A baseball team plays in a stadium that holds 55,000 spectators. With a ticket price at $10, the average attendance has been 27,000. A market survey indicates that for every dollar the ticket price is lowered, attendance increases by 3000. (a) Find a linear function that models attendance in terms of ticket price. (b) Find a function that models the revenue in terms of ticket price. (c) Find the price that maximizes revenue from ticket sales. (d) Extra-credit 2 pts. What ticket price is so high that no revenue is generated