hello I need help with my economics long discussion.

Prompt:

1) What is the definition of " opportunity cost" ? with an example

2) Compare the difference between "Change in Supply"and " Change in Quantity Supplied". Discuss the causes and shape of curve

3) At what price does Shortage and Surplus occur ? Once a market has shortage and Surplus, then what happens to the market price?

4) if a decrease in Demand is smaller than a decrease in Supply, what happens to an equilibrium price and output sales?

5) if Coke price goes down, what happens to Pepsi demand? why?

No references