Question: You know that you sound better when you sing in the shower. This has to do with the amplification of frequencies that correspond to the standing-wave resonances of the shower enclosure. A shower enclosure is created by adding glass doors and tile walls to a standard bathtub, so the enclosure has the dimensions of a standard tub, 0.75m wide and 1.5m long. Standing sound waves can be set up along either axis of the enclosure.

Part A: What are the lowest two frequencies that correspond to resonances on each axis of the shower?

I need tutor help to solve the above question and these frequencies will be especially amplified. Assume a sound speed of 343 m/s.