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# The following table shows values of a periodic function f(x). The maximum value attained by the function is 4. x: 0 2 4 6 8 10 12 f(x): 4 0 -4 0 4 0

4 0 -4 0 4 0 -4

**(a)** What is the amplitude of the function?

The amplitude of this function is _________

**(b)** What is the period of the function?

The period of this function is ________

**(c)** Find a formula for this periodic function.

f(x) = _________