Can you please explain how to solve these problems?

especially the second and third ones. I really don't know Can you please explain it?

An elec raveling in the - carries current in the +z direction (out of the page). ty i. What is the direction of the magnetic field caused by the wire at the charge's location? A. +x (right) B. -x (left) C. -y (down) 3 A D. +y (up) E. The magnetic field is zero +X ii. In which direction is force caused by the wire on the electron? 3 mm A. -z (into the page) B. +z (out of the page) C. +y (up) D. -y (down) 1300 m/s E. The force is zero 2) A 4 amp current flows in the +y direction 3mm away from a 2 amp current which also flows in the +y direction as shown. i. The magnitude of the magnetic field caused by the 4A current at the location of the 2A current is A. 0 B. 2.7E-4 T 4 A C. 1.3E-4 T 2 A D. 83 T E. 170 T ii. The direction of the force exerted by the 4A current on a one meter long segment of the 2A current is 3 mm A. -z (into the page) B. +z (out of the page) C. +x (right) D. -x (left)