Physics - Electromagnetic Induction #9

Two long parallel wires carry currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of wires at a point that is 20 cm from one wire and 60 cm from the other?

The figure shows three long, parallel current-carrying wires. The magnitudes of the currents are equal and their directions are indicated in the figure. Which of the arrows drawn near the wire carrying current 1 correctly indicates the direction of the magnetic force acting on that wire?

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Why is it A direction? How do you use the RH rule in this case? @engineer thileban