$5)$ Two parallel, circular loops carrying a current of $40$ A each are arranged as shown in Figure $5.$ The first loop is situated in the $\backslash ($ x$-$y $\backslash )$ plane with its center at the origin, and the second loop's center is at $\backslash ($ z$=2\backslash$mathrm$\{$~m$\}\backslash ).$ If the two loops have the same radius $\backslash ($ a$=3\backslash$mathrm$\{$~m$\}\backslash ),$ determine the magnetic field at:

$($a$)\backslash ($ z$=0\backslash )$

$($b$)\backslash ($ z$=1\backslash$mathrm$\{$~m$\}\backslash )$

$($c$)\backslash ($ z$=2\backslash$mathrm$\{$~m$\}\backslash )$

Figure $5$