$\"\"$

(a)

The cost function is $\"\"$ .

Graph the function in the range $\"\"$ .

$\"\"$

(b)

$\"\"$

Find the value of the function at $\"\"$ .

Observe the graph that as $\"\"$ tends to $\"\"$ , $\"\"$ approaches to $\"\"$ .

Consider the nearest values of $\"\"$ .

Complete the table using graph and then estimate the value at $\"\"$ .

\ \

\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \

$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$
$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$

$\"\"$ .

$\"\"$

(c)

Find the value of the function at $\"\"$ .

Observe the graph:

The solid dot indicates the value of the $\"\"$ at $\"\"$ .

As $\"\"$ tends to $\"\"$ from left hand side then $\"\"$ approaches to $\"\"$ .

As $\"\"$ tends to $\"\"$ from right hand side then $\"\"$ approaches to $\"\"$ .

Since the left hand limit and right hand limit are not equal, limit does not exist.

$\"\"$ does not exist.

Complete the table using graph and then estimate the value at $\"\"$ .

\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \

$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$
$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$

$\"\"$ does not exist.

$\"\"$

Graph the function $\"\"$ in the range $\"\"$ .

$\"\"$

(b)

\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \

$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$
$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$

$\"\"$ .

(c)

\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \

$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$
$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$

$\"\"$ does not exist.