A small horsepower Briggs engine's spark plug is firing too late. Tech a says that the spark plug gap may be to small. Tech b says that the spark plug gap may be too big. Who is correct?

While discussing ignition timing requirements: Technician A says that more advanced timing is desired when the engine is under a heavy load. Technician B says that more advanced timing is desired when the engine is running at high engine speeds. Who is correct?

Tech a says, to avoid damage to the spark plug threads of an aluminum head, an anti-seize compound should be utilized. Tech b says an assembly grease should be used. Who is correct?

Technician A says there is less heat energy in high octane gasoline and, therefore less power is genorated during combustion. Technician B says usung a higher octane gasoline than required will not produce more power inless the engine has a knock sensor that allows the system to adjust ignition timing to take advantage of the higher octane. who is correct?