For a cylindrical S$-590$ specimen $($Animated Figure $8\mathrm{.}33)$ originally $11$ mm in diameter and $538$ mm long, what tensile load $($in N $)$ is necessary to produce a total elongation of $3\mathrm{.}5$ mm after $1000$ hours at $815C?$ Assume that the sum of instantaneous and primary creep elongations is $0\mathrm{.}71$ mm $.$

$$ N