$(10\%)$ A submerged crest stone mound breakwater is constructed in water that is $5\mathrm{.}1m$ deep with its crest located $1\mathrm{.}0m$ below the still water level. The incident design wave has a significant height of $1\mathrm{.}45m$ and a significant period of $4\mathrm{.}4s.$ What median diameter stone is required for zero damage stability $($assume specific gravity of stone is $2\mathrm{.}65)$ if the face slope is $1$:$1\mathrm{.}75?$