How do I solve this?

1.

Two current loops with radius 10cm are about 0.5cm apart (which is close!) parallel to each other, and co-axial. Loop 1 is carrying 20A of current and loop 2 is carrying 5A of current. The currents are in opposite directions in the two loops. a. [3] Estimate the strength of the magnetic field that loop 1 exerts on each point of loop 2. b. [2] Estimate the strength of the magnetic field that loop 2 exerts on each point of loop 1. c. [2] What is the direction of the fields you estimated in a and b? Indicate the direction of the fields in a diagram of the two loops. cl. [3] what is the force the two rings experience, and in which direction? Loop 1 l L 2 5A 00\" Consider a proton with some initial speed1 v, oriented an angle 9 from the 1 axis. The proton is situated between two regions of constant magnetic elds, |B| = B, of some width, d, separated by a distance, D. In this conguration of magnetic elds, the proton may become trapped between the regions of constant magnetic elds, reecting off the magnetic l\"barriers\