part A) A particle of charge (8.40x10^-7) C moves up with a velocity of (6.8x10^5) m/s through a (7.20x10^-1) T magnetic field directed out of the page. Determine the magnitude and direction of the magnetic force experienced by this particle.

part B) An electron with a velocity of (5.361x10^7) m/s [left] through a (1.90x10^0) T magnetic field directed into the page. Determine the magnitude and direction of the magnetic force experienced by the electron.