Help please

A particule with Charge 9: 20.2 mc and mass 7:65 ing has a Kinetic energy of K= 54. 1 moving clockwise on your Screen on a circle of Radius R= 7:94 m 1 ) what is the speed of this particule, Enter speed inkunit km's 2 ) what is the magnetic field that sitting in? A field out of the screen will be 3) What is the Cyclotron angular w of this particule () if we were double the kinetic energy K, double the Charge and double the magnetic field B. what would be the new padius