Using Lorentz transformation of velocities, show that synchrotron emission from an ultrarelativistic electron (v ≈ c) is beamed in the direction of motion and into the cone with a half-opening angle θ ≈ 1/γ, where γ is the Lorentz factor. The ingredients necessary for this calculation are provided in Chapter 1 of the textbook. Show all intermediate steps, sketch the angles and vectors under consideration, and explain any assumptions and approximations that you make along the way.