Observe the given table and answer the question:

Units of a commodity

TU units

MU units

1

6

6

2

11

5

3

15

4

4

15

0

5

14

-1

1. Draw total utility curve and marginal utility curve
Ans:-

2. When total utility is maximum marginal utility is ……………
Ans:-When total utility is maximum marginal utility is zero
3. When total utility falls, marginal utility becomes ……………….
Ans:-When total utility falls, marginal utility becomes negative.