a. The value of the line integral of the magnetic field
vec(B)around the closed path as shown in the figure is
2.75\times 10^(-5)Tm. What are the direction (in or out of the page) and magnitude of
I_(3)? b. Evaluated the line integral of the magnetic field
vec(B)around the closed path around four wires carrying currents
I_(1),I_(2),I_(3), and
I_(4)as shown in the figure
