Income Tax In a certain country the tax on incomes less than or equal to €20,000 is 10%. For incomes that are more than €20,000 the tax is €2000 plus 20% of the amount over €20,000. (a) Find a function f that gives the income tax on an income x. Express f as a piecewise defined function. (b) Find f. What does f' represent? (c) How much income would require paying a tax of €10,000?

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