$13\mathrm{.}61$ Find the simplified sum$-$of$-$products representation of the function from the Karnaugh map shown in Figure P$13\mathrm{.}61.$

$\backslash$table$[[A*B,00,01,11,10],[00,0,1,x,0],[01,0,1,x,0],[11,0,1,0,1],[x,x,1,0,]]$

Figure P$13\mathrm{.}61$