Let’s design a velocity selector device for a mass spectrometer.a.Illustrate the device and explain how it works. b.The electricfield inside the device will operate at a level of 12.0E3 V/m. Whatwill be the force on an ionized Calcium atom (q = +2 e) as it movesthrough the selector?c.If the magnetic field inside the deviceoperates at a level of 0.250 T, what velocity will the deviceselect?d.Explain what happens to negative ions travelling above orbelow the selection spe