A cyclotron with dee radius 53.0 cm is operated at an oscillatorfrequency of 12.0 MHz to accelerate protons, (a) What magnitudeB of magnetic field is required to achieve resonance? (b)At that field magnitude, what is the kinetic energy of a protonemerging from the cyclotron? Suppose, instead, that B =1.57 T. (c) What oscillator frequency is required to achieveresonance now? (d) At that frequency, what is the kinetic energy ofan emerging proton?