A student pushes two blocks across a desk, accelerating both blocks. The mass of block $A$ is larger than the mass of block B$.$ Friction exists on all surfaces.

What are the horizontal forces on blocks A and B$?$ Select all that apply.

$F_{pB\text{p}\text{e}\text{r}\text{s}\text{o}\text{n}}$

$F_{\text{f}\text{A}\text{B}}$

$F_{PA\text{p}\text{e}\text{r}\text{s}\text{o}\text{n}}$

$F_{fA\text{d}\text{e}\text{s}\text{k}}$

$F_{\text{f}\text{B}\text{A}}$

$F_{fB\text{d}\text{e}\text{s}\text{k}}$