If a photon of wavelength 0.04250 nm strikes a free electron and is scattered at an angle

Question:

If a photon of wavelength 0.04250 nm strikes a free electron and is scattered at an angle of 35.0° from its original direction, find
(a) The change in the wavelength of this photon;
(b) The wavelength of the scattered light;
(c) The change in energy of the photon (is it a loss or a gain?);
(d) The energy gained by the electron.