a.

i. Distinguish between:
money cost and opportunity cost

ii. Distinguish between:
normal good and inferior goods

b. 

i. Explain how the scale of preference assists the following economic groups in making efficient allocation of their resources:

individuals

ii. Explain how the scale of preference assists the following economic groups in making efficient allocation of their resources:
firms

iii. Explain how the scale of preference assists the following economic groups in making efficient allocation of their resources:
government