Please, I really need help on this question ASAP, I will leave you a very good review when you are done. Thank you!

Question 19 [2 points} An unknown particle travelling with a velocity of 3.12 x 105 mfs enters a 54 mT magnetic field and curves in a circular path with a radius of 12 cm. Determine the charge-to-mass ratio, enter that value in the first blank [with three significant figures of accuracy). From the table of particles on your clata sheet {showing clata for the charge and mass for alpha particle, electron, proton, and neutron) , the identity of the unknown Blank#2 {V