In the figure, two similar coils of radius $20cm$ and $10$ turns are placed $20cm$ away parallel to each other. If the current through them is $100A$, find the value of the magnetic field at the midpoint of the axis of the coils, in milliTeslas (mT).

$\mu_0=4\pi\times10^{-7}$

Hint: Magnetic Field of a Current Loop (gsu.edu)