Hello, I have difficulty understanding the following exercise, thank you:

2. If 5 units of a variable factor generate 74 tons of output and 6 units of the variable factor generate 81 tons, the marginal product of the variable factor is 74 tons of output.

True

False

13. The marginal rate of substitution (MRS) is the rate at which one input can be substituted by another without changing the level of output.

True

False

15. Variable factors are a phenomenon of:

a.the short run only

b.the long run only

c.large firms only

d.the long run and the short run

16. Assume that labour is the only variable factor. The total product of 10 workers is 65 units of output, and the total product of 15 workers is 80 units of output. At this level of production, the marginal product of labour is:

a.6.5

b.8.0

c.3.0

d.5.3

22. Consider the following production schedule :

Number of Workers	Output
0	0
1	50
2	110
3	180
4	260
5	330

What is the marginal product of the fourth worker?

a.65

b.75

c.70

d.80

23. Refer to the table below, which shows various methods of producing DVD players, to answer the question below

Method Capital Labour Output

A 50 250 5000

B 90 450 5000

C 25 400 5000

The method of production that is technically inefficient is:

a.A

b.C

c.B

d.they are all technically inefficient

30. The most technically efficient method is:

a.the one that has the lowest cost

b.the one that uses the smallest quantity of workers

c.the one that uses the most efficient machines

d.the one that uses the least inputs