You are configuring a wireless access point $($AP$).$ You specify a wireless standard of $802\mathrm{.}11$n operating in the $2\mathrm{.}4$ GHz band. You also select an option to make it operate in a $$backward compatible$$ mode. Therefore, what additional $802\mathrm{.}11$ standards are supported? Each correct answer represents a complete solution. Choose all that apply.