Note: In doing these exercises assume the following when interpreting
the table on p. 211
| Number of interactions | Instructions per year per programmer | Instructions per day per programmer |
| Very few interactions (1 - 2 programmers) | 10,000 | 50 |
| Some interactions (3 - 10 programmers) | 5,000 | 25 |
| Many interactions (more than 10 programmers) | 1,500 | 7.5 |
p. 212 Exercise 2
p. 212 Exercise 4