An alloy has $30$ wt$\%$ aluminum and $70$ wt$\%$ copper. The atomic weight of aluminum is $26\mathrm{.}98$g$/$mol$,$ and that of copper is $63\mathrm{.}55$g$/$mol$.$ What is the atomic percent of aluminum in alloy?

Group of answer choices

$84\mathrm{.}6$ at$\%$

$26\mathrm{.}98$ at$\%$

$30$ at$\%$

$50\mathrm{.}2$ at$\%$