I've missed the right hand tutorial and it's still confusing just by watching certain videos, can someone explain the theme of it.

Problems and right-hand rules 19. If the magnetic field is into the page, find the direction of the force on an electron moving up the page. 20. Find the force on a 100m wire carrying 20A west in a magnetic field of strength 37 JT north. (find magnitude and direction) 21. Find the velocity (magnitude and direction) of an proton (q = 1.6 x 10-19 C) if the upward force on it is 3.7 x 10 -18 N in a magnetic field of 5.3 mT west. 22. A voltage of 5 V is induced in a 10.5 m long wire when it is moved through a magnetic field at 25 m/s. How strong is the magnetic field