$9.$ Two spheres are each rotating at an angular speed of $24$ rad$/$s about axes that pass through their centers. Each has a radius of $0\mathrm{.}20$ m and a mass of $1\mathrm{.}5$ kg$.$ However, one is soild and the other is a thin$-$walled spherical shell. Suddenly, a net external torque due tofriction of magnitude $=0\mathrm{.}12$ N m begins to act on each sphere and slows their motiondown.I $($solid Spla$)=2/$MR$23$ I $($thin$-$ walled Splasical shall$)=$ MR$\backslash$deg $($a$)$ The solid sphere comes to a halt first;$($b$)$ The thin$-$walled spherical shell comes to a halt first;$($c$)$ Both sphere come to halt at the same time;$($d$)$ None of the above.