Find the magnitude of the magnetic field at the origin O due to a very long conductor carrying current I of the shape .

Question

$\begin{array}{1 1} \frac{\mu_0 I}{2r} \bigg[\frac{\hat i}{\pi}+\frac{k}{2} \bigg] \\\frac{\mu_0 I}{r} \bigg[\frac{\hat i}{\pi}+\frac{k}{2} \bigg] \\ \frac{\mu_0 I}{4r} \bigg[\frac{\hat i}{\pi}+\frac{k}{2} \bigg] \\ \frac{\mu_0 I}{4r} \bigg[\frac{\hat i}{2}+\frac{k}{\pi2} \bigg] \end{array} $