Solve the all parts of given question:

Question: A radar installation used for monitoring thunderstorms emits radio waves at a frequency of 2750MHz . A line of thunderstorms is approaching the installation at 44.0km/h.

Part A: By what amount does the frequency differ from 2750MHz ? (You may use the formulas derived in Problem 16.78 in the textbook. Radio waves travel at the speed of light, c= 3.00 × 108 m/s).

Part B: Radio waves are reflected from the water drops in the thunderstorms, and the reflected waves are detected back at the installation. As measured by the receiver at the installation, is the frequency of these reflected waves greater or less than 2750 MHz? By what amount does the frequency of the reflected waves differ from 2750MHz?

It'd be really helpful if you could show all steps of your work for above question.