Answer:
a. 2.6*10^{-5}T
b. north to south
Explanation:
In this case you have to take into account the expression for the magnetic field generated by a current
where mu0 is the magnetic permeability of vacuum, I is the current and r is the distance to the conductor in which you want to measure the field.
A) By replacing we have
B) The direction is obtained by using the right hand rule. In this case, the current is from west to east. Then the direction is from north to south
Hope this helps!!