We want to use a “Bainbridge” mass spectrograph to discriminate between 56Fe and 57Fe isotopes of mass 55.935 u and 56.935 u, respectively. Assume that these isotopes have lost a single electron and entering the spectrograph with a speed of 3.25x10^5 m/s (a) What is the magnetic field required to give them an orbit radius of about 1.0m? (b) What will be the separation r between their points of impact at the photographic plate?