**Answer: Option (b) is correct.**

**Explanation:**

Economists are generally using both the methods for calculating GDP because the combined estimates from both the methods provides a more appropriate measure of GDP.

For instance, there is an construction industry and for this industry all the costs incurred before the generation of income. So, expenditure method is more appropriate for this type of industry.

Alternatively, in the service sector income method is more appropriate than the expenditure method.

Answer: Radio advertisement

Explanation:

From the question, we are informed that Jack,an HR manager at an electronics firm, has been informed that he needs to hire twenty technicians immediately.

The best method to get quality technicians will be through advertising on radio. Through this method, a larger number of people will be reached and radio advertisement is usually effective.

College is the answer beep beep bop beep boo beep

Provide Labor And Buy Goods

**Answer:**

Let Lt = Loan in period t , t= 1...4

It = Investment in period t, t= 1...4

These are the decision variables

The objective is to maximize the net income which is the difference between Loan and investment in period 4

Investment income in period 4 = 110% of I4 = 1.1I4

Expense and loan in period 4 = 1.085 L4

So,

Maximize Z = 1.1I4-1.085 L4

Constraints

L1<= 3000

I1<= 4500

L1-I1= 100( Payroll payment)

L2<= 7000

I2<= 8000

L2+1.1I1-1.085L1-I2=120

L3<=4000

I3<= 6000

L3+1.12I2-1.085L2-I3=150

L4<=5000

I4<=7500

L4+1.13*I3-1.085L3-I4=100

1.10I4-1.085L4>=0

Lt, It>=0

Putting this in excel sheet,

See remaining part in pictures attached.

**Explanation:**

See pictures attached.