$\"\"$

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(a)

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

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Observe the points from the graph of function $\"\"$ and $\"\"$ as follows :

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$\"\"$ and $\"\"$ .

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The difference of $\"\"$ is

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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The value of $\"\"$ .

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$\"\"$

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(b)

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The functions are $\"\"$ .

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Observe the points from the graphs $\"\"$ as follows:

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$\"\"$

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The product of $\"\"$ is $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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(a)

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(b) The value of $\"\"$ .