Table:
text: British Rail Classes 253, 254 and 255
Class 253 and 254
Class 253 and 254
Class_ Operator_ Number_ Year_Built Cars_per_Set Unit_Numbers_
Class 253 BR Western Region 27 1975-1977 9 253001-253027
Class 253 BR Western Region 13 1978-1979 9 253028-253040
Class 253 BR Cross Country 18 1981-1982 9 253041-253058
Class 254 BR Eastern Region BR Scottish Region 32 1977-1979 10 254001-254032
Class 254 BR Eastern Region BR Scottish Region 4 1982 10 254033-254037

Question: What is the smallest number of carriages per set built between 1977 and 1979 greater than 32 under British Rail Classes 253, 254 and 255?

Question: Which British Rail Class 253, 254 and 255 unit has 1982 cars built per set larger than 9?

Question: What is the largest number of carriages per set that is less than 9 for British Rail Class 253, 254 and 255?

Question: What year was the 253 larger than 18 class built for the British Rail Class 253, 254 and 255?