Economics intro: supply and demand revision

Which of the following do we NEED the most?

When the price of shoelaces increases, the price of shoes will increase. This is an example of:

True or false: when three new bike stores open in Swan Hill, the price of bikes is likely to go up.

Which of the following would be best described as a WANT?

The price of nachos in the canteen goes up, so more students begin buying sandwiches. This is an example of:

A new tax on cheese increases the cost of supplying nachos. Which of these things is likely to happen?

True or false: a WANT is something we can do without.

A cyclone wiping out banana crops in Queensland causes the price of bananas to increase. This is:

Fifteen students want to buy nachos at the canteen and sixteen serves of nachos are available

True or False: if demand for toilet paper goes up suddenly, the price of toilet paper will go down.