Calculate the percentage change in photon energy during a collision like that in the figure for φ = 90˚ and for radiatio

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Calculate the percentage change in photon energy during a
collision like that in the figure for φ = 90˚ and for
radiation in (a) the microwave range, with λ = 1.6
cm; (b) the visible range, with λ = 547 nm;
(c) the x-ray range, with λ = 28 pm; and
(d) the gamma-ray range, with a gamma photon
energy of 0.99 MeV.
i got a) -1.51e-8 % and c) -7.99 %
please help with b) and d) !
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