Table:
text: Valley Metro (Phoenix) bus fleet
Retired
Retired
Make_Model Length_ Year_ Numbers_Quantity_Ordered Fuel_Propulsion Year_Retired
Flxible 53096 New Look 40` 1973 4701-4740 (40 buses) Diesel 1994
Flxible 53096 New Look 40` 1975 4741-4755 (15 buses) Diesel 1994
AM General Model 9640A 40` 1975 4756-4788 (33 buses) Diesel 1996
AM General Model 9640A 40` 1975 5101-5115 (15 buses) Diesel 1996
MAN / AM General SG-220 60` 1979 7001-7020 (20 buses) Diesel 1998
GMC T8H-203  RTS -03 40` 1979 4501-4537 (37 buses) Diesel 2002
GMC T8J-204  RTS -04 40` 1981 4401-4415 (15 buses) Diesel 2002
GMC T8J-204  RTS -04 40` 1981 4301-4315? (15? buses) Diesel 1999?
GMC T8J-204  RTS -04 40` 1982 4538-4557 (20 buses) Diesel 2002

Question: What is in the Valley Metro (Phoenix) bus fleet for 1975 Propulsion with a number (quantity ordered) of 4756-4788 (33 buses) in the Retired category?