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...

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).