A long, hollow, cylindrical conductor $($inner radius $2\mathrm{.}4$ mm $,$ outer radius $5\mathrm{.}1$ mm $)$ carries a current of $57$ A distributed uniformly across

its cross section. A long thin wire that is coaxial with the cylinder carries a current of $46$ A in the opposite direction. What is the

magnitude of the magnetic field $($a$)1\mathrm{.}4$ mm $,($b$)2\mathrm{.}5$ mm $,$ and $($c$)5\mathrm{.}7$ mm from the central axis of the wire and cylinder?

$($a$)$ Number

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$($b$)$ Number

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$($c$)$ Number

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