Select all that apply. When Q $<$ K for a weak acid, which of the following must be true?

Question $7$ options:

the backward reaction is energetically favoured over the forward reaction

$[$H$+]<[$A$-]$

$[$HA$]<[$HA$]$ at equilibrium

$[$A$-]>[$H$+]$

none of these

$[$A$-]>[$A$-]$ at equilibrium

pH $<5$