Solve the problem.

A company is constructing an open$-$top, square$-$based, rectangular metal tank that will have a volume of $69f{t}^3.$ What dimensions yield the minimum surface area? Round to the nearest tenth, if necessary.

$11\mathrm{.}7ft11\mathrm{.}7ft0\mathrm{.}5ft$

$4\mathrm{.}1ft4\mathrm{.}1ft4\mathrm{.}1ft$

$5\mathrm{.}9ft5\mathrm{.}9ft2ft$

$5\mathrm{.}2ft5\mathrm{.}2ft2\mathrm{.}6ft$