Exercise 1 solution

Honey: 500 kg / 100 hives = 5 kg per hive per year (potential).
Beeswax: 70 kg / 100 hives = 0.7 kg per hive per year (potential).

Why an estimate: the article says the apiary "could have accommodated around 100 hives" and gives a "potential annual yield". Thirty hives were actually found; the rest is reconstruction, and the yields are what the site could have produced, not a recorded harvest.