Estimate the energy content of a solid$-$waste sample with the following composition by modified Dulong formula.

$\backslash$table$[[$Composition$,\%$ by mass,Moisture content $(\%)],[$Food wastes,$32,70],[$Paper$,20,6],[$Cardboard$,16,5],[$Plastics$,12,2],[$Garden trimmings,$10,60],[$Wood$,7,20]]$

$8\mathrm{.}65M\frac{J}{k}g$

$12\mathrm{.}2M\frac{J}{k}g$

$16\mathrm{.}5M\frac{J}{k}g$

$5\mathrm{.}45M\frac{J}{k}g$