4. 22 rows - 19 rows = 3 rows, 3 rows/2 = 1.5 rows, 1.5 rows x 4 seats =
6 seats remaining.
5. 13 1/2 years + 11 1/2 years = 25 years, 89 yeas - 25 years =
64 years older
6. 29 adults + 22 children = 51 people, 51/4 = 12 full rafts with the
last raft seating 3 people.
