Verified answer

To find wavelength given velocity first convert your MHz to hz. So 107.3x1x10^6=1.073x10^8

Now divide speed of light constant by the frequency

2.998x10^8/1.073x10^8=

2.79m is your wavelength

To find frequency you divide the speed of light constant by your wavelengh(in meters)

2.998x10^8/5.4=

5.55x10^7hz

Then divide 5.55x10^7 by 1x10^6 and you get

55.5mhz

I put the more complicated way to solve this because in all the wavelength/ frequency problems I've seen we're generally worked with your wavelength in meters and your frequency in hz. Unless on say a test your question specifically asked for your answer in say nm or mhz but I've rarely seen answer choices on my chemistry tests in that format.

Plus it helps to know other ways of figuring things out considering your test questions won't always be like your examples

Wavelength = 3 ^8 / frequency in Hz

Frequency = 3 ^8 / Wavelength in M

1) 300/107.3 = 2.796 metres.

2) Frequency = 300/5.4, = 55.55mHz.