Can someone help me and solve part (f)? explain why the answer to part f is 5.06. thank you:)

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving

Aspectroscope breaks light up into its colors, allowing scientists to analyze light from the solar system and universe. by studying the spectral line patterns, widths, strengths and positions, scientists can determine the speed, position, and of celestial bodies. a) age b) origin c) rotation d) temperature

If frequency goes up, what happens to wavelength? does it get shorter or longer?