explain all the following with examples please.

1 what is economics?

what are the six principles of economics, be able to give examples on each principle and the concepts of the of them.

2

What is a model?

three caveats for empirical analysis 3 how can i be able to distinguish "demand curve" and "quantity demanded"

what are the Concept of the law of demand.

how can i Distinguish between movement along the demand curve and shift in demand

what are the Factors that cause demand curve to shift

Normal goods and Inferior goods (explain)

How do factors shift the demand (which direction the demand curve is shifted)?

Quantity supplied, supply curve (explain)

Movement along the supply and shift in supply curve

what factors shift supply curve

how the factors shift supply (at which direction the supply curve is shifted)?

what are the concepts of equilibrium price and quantity

explain excess supply and excess demand...

how are equilibrium price and quantity determined?

how can i identify how equilibrium price and equilibrium quantity change when some events happen.

Chapter 4 Elasticity what is the concept of price elasticity of demand

How to calculate it

what are elastic demand, inelastic demand? Examples of goods that have elastic demand and inelastic demand

5

concept of willingness to pay, know that demand curve is wiliness to pay curve

how to know that supply curve is seller's cost curve or willingness to sell curve

concept of consumer surplus, knows how to identify the area that is consumer surplus

concept of producer surplus, knows how to identify the area that is producer surplus

concept of economic surplus