A space explorer who does a little anthropology on the side, observes the natives of a distant planet emitting mating calls. Ronald Qrxxt emits a mating call having a frequency of 200-Hz. This tone resonants with a fundamental frequency of the future Mrs. Qrxxt's intercranial cavity. Her intercranial cavity is located midway between her two heads. This intercranial cavity is a closed tube 45.0 cm long.

a. What must be the speed of sound on the planet for resonance to occur with Ronald's mating call?

b. What is the temperature on the planet when the space explorer is observing the mating calls?

c. What could be another possible mating call frequency that Mrs. Qrxxt might respond to?