A. Which of the following related products would be considered joint products? Explain your choices.
1. Sand produced with three levels of fineness
2. Automobiles and trucks
3. Milk, yogurt, butter, and cheese
4. Motorcycles and mopeds
5. Various lines of clothing manufactured for a discount department store
6. An airline that provides first class, business class, and economy class service
B. List two additional product groups that could be considered joint products.