Show on a diagram the effect to decrease in demand of a good on its equilibrium quantity.

Show on a diagram the effect to decrease in supply of a good on its equilibrium quantity.

Show diagrammatically the effects of increase in demand of a good on its equilibrium price.

Show diagrammatically the effects of increase in supply of a good on its equilibrium price.

Explain the effect of simultaneous 'decrease' in demand and supply on equilibrium quantity. Represent one of the possible effect on a diagram.

Explain the effect of 'decrease' in demand on equilibrium price. Use diagram.

Explain the effect of shift in demand on equilibrium price and quantity. Use diagram.

Explain the effect of a laftward shift of demand curve of a commodity on its equilibrium price with the help of a diagram.