The key answer of exercise 1

c)

1. at least a thousand each
2. above
3. a) blue b) green c) red d) yellow and orange
4. twenty-five percent
5. Monday and Tuesday between eleven and one o'clock

d)

1. how people / consumers choose brands
2. It turns the decision to buy from a yes / no question into a Which one? question.
3. 1 → People like to save money, so they're attracted to lower prices. 2 → They also think that a higher price means higher quality, so when they want to 'treat' themselves, they buy the higher priced item.
4. 1 → Distribution of a viral video is free, and 2 → it can get millions of views if successful.
5. Five possible elements are mentioned, so any four of these: 1 → grab the viewer in the first 5 seconds 2 → make it memorable (or make it bizarre so that it's memorable) 3 → make it short (15-60 seconds) 4 → post it on a Monday or Tuesday, between 11a.m. and 1p.m. 5 → tell a story