$\"\"$

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The function are $\"\"$ and $\"\"$ .

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(a) When $\"\"$ , $\"\"$ .

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Graph :

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Graph the functions $\"\"$ and $\"\"$ and label the intersecting points.

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$\"\"$

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Observe the graph:

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The intersecting points are $\"\"$ and $\"\"$ .

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$\"\"$

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(b) When $\"\"$ , $\"\"$ .

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Graph :

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Graph the functions $\"\"$ and $\"\"$ label the intersecting points.

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$\"\"$

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Observe the graph:

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The point of intersection of the two functions is $\"\"$ .

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$\"\"$

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(c) Find the value of $\"\"$ such that $\"\"$ for all $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Where $\"\"$ decreases from the value $\"\"$ to zero when $\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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(a) $\"\"$ and $\"\"$ .

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(b) $\"\"$ .

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(c) $\"\"$ .