I need help with those problems. I don't know how to solve them. Please

. A 1.5 m long currentcarrying wire runs across this page. The current (1.8 A) ows from left to right. Amagnetic eld of 0.06 T is directed from the top of the page to the bottom. What is the magnitude and direction of the magnetic force produced? . A positive charge of 0.25 C moves horizontally to the right at a speed of 2.0 x 102 ms and enters a magnetic field directed vertically downward. If it experiences a force of 20 N, what is the magnetic field strength? . A particle with a charge of 0.015 C, travelling from left to right across this page at a velocity of 25,000 mis, passes through a 0.75 T magnetic field, directed from the top of the page to the bottom. What is the magnitude and direction of the magnetic force on this particle? . A 0.75 m long wire is placed along the x-axis, perpendicular to a 0.055 T magnetic field, directed downwards. When a 12 V battery is connected to the wire, a force of 1.5 N is produced (directed towards you). A) What is the wire's resistance? B) What direction does the current flow