How do you get the answer to the questions listed below?
 Light is gathered from a distant galaxy and one of the spectral lines of Calcium is observed at 413.26 nm when it should be 393.37 nm.
(a) Find the velocity of this galaxy (hint: Doppler formula).
(b) Find the distance to this galaxy (hint: Hubble Law).
Answer: 14,786 km/s, 205 Mpc
 Answer the questions about the two galaxies below.
(a) Find the velocity of a galaxy if it is 8.22 Mpc away.
(b) Find the distance to a galaxy if it is moving away at a speed of 50,000 km/s.
Answer: 592 km/s, 694 Mpc
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