Technician a says that one of the advantages of a two-stroke engine is its light weight. technician b says that one of the advantages of a two-stroke engine is that there is no need for an oil sump. who is correct?

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up