What are (a) The Compton shift , (b) The fractional Compton shift /, and (c) The change

What are 

(a) The Compton shift ∆λ, 

(b) The fractional Compton shift ∆λ/λ, and 

(c) The change ∆E in photon energy for light of wavelength λ = 590 nm scattering from a free, initially stationary electron if the scattering is at 90^o to the direction of the incident beam? What are? 

(d) ∆λ, 

(e) ∆λ/λ, and 

(f) ∆E for 90^o scattering for photon energy 50.0 keV (x-ray range)?