in the diagram, four squares of side length $2$ are placed in the corners of a square of side length $6$. each of the points $w$, $x$, $y$, and $z$ is a vertex of one of the small squares. square $abcd$ can be constructed with sides passing through $w$, $x$, $y$, and $z$. what is the maximum possible distance from $a$ to $p$?
