$10.$ A person standing $1\mathrm{.}00$ m from a portable speaker hears its sound at an intensity of $7\mathrm{.}5031023$ W$/$m$2.($a$)$ Find the corresponding decibel level. $($b$)$ Find the sound intensity at a distance of $35\mathrm{.}0$ m$,$ assuming the sound propagates as a spherical wave. $($c$)$ Find the decibel level at a distance of $35\mathrm{.}0$ m$.$