A standing wave on a string fixed at both ends is vibrating at its 4th harmonic. If the length, tension, and linear density are kept constant, what can be said about the wavelength and frequency of the 5th harmonic relative to the 4th harmonic?

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?