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The functions are $\"\"$ and $\"\"$ .

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If $\"\"$ , then $\"\"$ .

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(a)

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Find $\"\"$ .

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Substitute $\"\"$ in $\"\"$ .

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$\"\"$

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Apply even-odd properties : $\"\"$ .

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$\"\"$

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$\"\"$ .

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(b)

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Find $\"\"$ .

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The function $\"\"$ .

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$\"\"$ .

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Apply periodic properties : $\"\"$

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$\"\"$ .

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$\"\"$

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Substitute $\"\"$ .

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$\"\"$

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$\"\"$ .

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(a). $\"\"$ .

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(b). $\"\"$ .