Discuss which of the following fall into the categories of consumption, investment, government expenditure and net exports from the Y = C + I + G + NX (X - M) identity, and whether the impact is to increase or decrease GDP.

1. Charles buys a second-hand textbook from Tim.
2. When Charles bought the book, he paid Sarah $10 to collect it from Tim.
3. Thomas buys a new house
4. Your firm sells meat to Indonesia
5. The fish and chips shop down the road buys fish to make meals for diners.
6. The same shop buys a deep fryer to fry fish for meals.