A tungsten matrix with $18\mathrm{.}9\%$ porosity is infiltrated with silver. Assuming that the pores are interconnected, what is the density $($in g$/$cm$3)$ of the composite before and after infiltration with silver? The density of pure tungsten is $19\mathrm{.}25$ g$/$cm$3$ and that of pure silver is $10\mathrm{.}49$ g$/$cm$3.$

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