Table:
text: List of MLW diesel locomotives
4-axle units
4-axle units
Model Build_date Total_produced Wheel_arrangement Prime_mover Power_output
C-424 1963–1967 92 B-B 16-251B hp (kW)
M-420 1973–1977 92 B-B 12-251C hp (kW)
M-420B 1975 8 B-B 12-251C hp (kW)
M-420R 1974–1975 5 B-B 12-251C hp (kW)
M-420TR 1972 2 B-B 12-251C hp (kW)
M-420TR 1975 15 B-B 12-251C hp (kW)
M-424 1980 19 B-B 16-251B hp (kW)

Question: What is the average total production if the prime mover 12-251c is in the list of 4-axle units of MLW diesel locomotives?

Question: What is the year of construction from the list of MLW diesel locomotives if 2:4 axle units are produced in total?

Question: What is the smallest total production among MLW diesel locomotives with a model of the M-420 among 4-axle units?

Question: What is the prime mover for a 1975 year of construction in the list of 4-axle units of MLW diesel locomotives?

Question: Which model of MLW diesel locomotives produced a total of more than 4 axle units and a prime move of 12-251c?