Help me with # 3 & #4 please

Avehicle has an oil leak that is causing the entire oil pan to be wet, but inspection reveals no exact source after cleaning off the oil residue. technician a says to install a fluorescent dye in the crankcase and operate the engine, then re-inspect for leaks with a special light (black light). technician b says the oil leak may be coming from a source at the top of the engine, such as a valve cover gasket. who is correct?

The cerebellum controls? thirst sensations sleep-wake cycles hand-eye coordination heart rate and pulse

The necleus of an atom is made up of what subatomic particles?