Answer:
speed of star is  1.37 ×  m/s
 m/s
it is approaching to earth because wavelength of star is decreasing than rest 
if emit same wavelength it does not move anywhere 
it will remain steady condition with respect earth 
Explanation:
given data 
wavelength = 656.5 nm
rest wavelength = 656.8 nm
to find out 
the speed of the star , is it approaching 
solution
we know here equation that is 
wavelength shift / wavelength at rest  = velocity of source / speed of light
so put all value and find
velocity of source = 3 ×  × 3 ×
 × 3 ×  / 656.8 ×
 / 656.8 × 
velocity of source star = 1.37 ×  m/s
 m/s
and
it is approaching to earth because wavelength of star is decreasing than rest 
and
if emit same wavelength it does not move anywhere 
it will remain steady condition with respect earth