Question: For the year 1975, what is Propulsion, with a Number (quantity ordered) of 4756-4788 (33 buses)?
SQL: SELECT "Fuel Propulsion" FROM "2-15142622-3" WHERE "Year" = 1975.0 AND "Numbers (Quantity Ordered)" = '4756-4788 (33 buses)';

Question: What is the make and model that retires in 2004, and has a numbers (quantity ordered) of 961-967 (7 buses)?
SQL: SELECT "Make/ Model" FROM "2-15142622-3" WHERE "Year Retired" = '2004' AND "Numbers (Quantity Ordered)" = '961-967 (7 buses)';

Question: What year was the Diesel fuel propulsion, with a length of 40', and numbers (quanity ordered) of 3701-3729 (29 buses), retired?
SQL: SELECT "Year Retired" FROM "2-15142622-3" WHERE "Fuel Propulsion" = 'Diesel' AND "Length" = '40''' AND "Numbers (Quantity Ordered)" = '3701-3729 (29 buses)';