Answer

 

 

Demand curve shifting right

Demand curve shifting left

Successful advertising campaign for 'Choccy' biscuits

Reduction in threshold for income tax

_

 

School playground fashion for 'Choccy' biscuits

Eat more fruit campaign

 

Demand Curve Shifts to the Right

Source: Ferl

 

Demand Curve Shifts to the Left

Source: Ferl