I need help with those problems. PLEASE!!!

5. An electron (mass of 9.1 x 1031 kg) moves from right to left with a velocity of 1.8 x 105 m/s. It passes through a magnetic field of 2.8 T, directed from top to bottom. A) What is the direction of the magnetic force on the electron? B) What is the electron's radius of curvature? 6. A 1.66 m long wire experiences a force of 0.0285 N when it is placed in a 0.75 T magnetic field. How much current is flowing through the wire? 7. An electron enters a 1.15 T magnetic field and moves with a radius of curvature of 0.0061 m. What is the electron's velocity? 8. A 2.6 x 10-" C charge, moving from top to bottom, passes through a 1.5 T magnetic field, directed from left to right. If the charge's velocity is 46,000 m/s, calculate the magnitude and direction of the magnetic force