Table: rowing_2008_men_coxless_7
Columns: rank
athlete
country
time
notes

Question: What is the rank of the athletes that have Notes of fb, and a Time of 6:47.30?
SQL: SELECT SUM("rank") FROM rowing_2008_men_coxless_7 WHERE "notes" = 'fb' AND "time" = '6:47.30'

Question: What is the least rank for athletes with a time of 6:36.65?
SQL: SELECT MIN("rank") FROM rowing_2008_men_coxless_7 WHERE "time" = '6:36.65'