1. (8 Points) A particle moves along a circular path in a region of uniform magnetic field of magnitude B = 4.7 mT, directed into the page. The particle is either a X X XXX proton or an electron (you need to decide which). It experiences a magnetic force of magnitude 5.2x10-15 N. X X X a) Which particle is it? X IX X X X b) What is the particle's speed? c) What is the radius of the circular path? X X X X What is the period of the motion? (e = 1.60 x 10 19 C, me = 9.11x10-34 kg, mp = 1.67 x 10-27 kg) X X X X X