Answer:
a. the current in the other second wire is 820.78 Ampere
b. the two currents are in opposite directions
Step-by-step explanation:
a. the current in the second wire is given by the expression for the force per unit lenght between two wires

where

substituting all these values into the expression for the force per unit length and then making
the subject
Note: convert 2.3 cm to meters = 0.023 meters

making
subject

simplifying will give

b. the force is attractive if the currents are in the same direction and repulsive if the force are in opposite directions