Please answer the following:

1. Marginal analysis refers to.
2. The demand for normal goods follows the law of demand because of:
3. Marginal costs
4. A budget line
5. If employees' activities follow the economists' view of behavior managers will be most effective if they can :
6. Marginal utility is the:
7. The income effect means that when the price of a good rises.
8. Sunk cost refer to:
9. The substitution effect.

Thank you!