Which of the following is an example of barter? 1. A parent…

Which of the following is an example of barter? 1. A parent gives a teenager a $10 bill in exchange for her babysitting 2. A homeowner gives an exterminator a check for $50 in exchange for extermination 3. A barber gives a plumber a haircut in exchange for the plumber fixing the barber’s leaky faucet 4. All of the above are examples of barter