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

(a)

Find the sum of two functions.

$\"\"$

$\"\"$ .

Domain of the function $\"\"$ is $\"\"$ .

Since the functions are related with time, the relevant domain of the function is $\"\"$ .

(b)

$\"\"$ .

$\"\"$ represents all factors that influence the budget.

(c)

Find $\"\"$ .

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

$\"\"$

$\"\"$ .

The value is $\"\"$ and it is represents the budget for $\"\"$ weeks.

(a) $\"\"$ ; Domain is $\"\"$ .

(b) $\"\"$ represents all factors that influence the budget.

(c) The value is $\"\"$ and it is represents the budget for $\"\"$ weeks.