Figure shows, in cross section, several conductors that carry curre...

Figure shows, in cross section, several conductors that carry currents through the plane of figure. The currents have magnitude \( \mathrm{I}_{1}=4.0 \mathrm{~A}, \mathrm{I}_{2}=2.0 \mathrm{~A} \) and \( I_{3}=2.0 \mathrm{~A} \) in direction shown in figure. Find the value of line integral \( \int \vec{B} \cdot d \vec{l} \) along the given loop
(1) \( -5 \times 10^{-6} \mathrm{Tm} \)
(2) \( 2.5 \times 10^{-6} \mathrm{Tm} \)
(3) 0
(4) \( 5 \times 10^{-6} \mathrm{Tm} \)