In $\triangle A B C$ and $\triangle P Q R$, if $\angle A=\angle Q, \angle B=\angle R$ and PR = AC, then two triangles are congruent by ____________ criterion.
In $\triangle A B C$ and $\triangle P Q R$, if $\angle A=\angle Q, \angle B=\angle R$ and AB = QR, then these triangles are congruent by ____________ criterion.