$\"\"$

(a)

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

Observe the graph:

As $\"\"$ gets closer to $\"\"$ from left hand side, the value of the function approaches to $\"\"$ .

Thus, $\"\"$

As $\"\"$ gets closer to $\"\"$ , the value of the function tends to around $\"\"$ .

The limit expression is $\"\"$ .

$\"\"$

(b)

Find $\"\"$ .

Observe the graph:

As $\"\"$ tend to large positive values , the value of the function decreases and gets closer to $\"\"$ .

$\"\"$ .

$\"\"$

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

(b) $\"\"$ .