The following prime implicant table $($chart$)$ is for a four$-$variable function $f(A,B,C,D).$

$\backslash$table$[[,2,3,7,9,11,13],[-0-1,,x,,x,x,],[-01-,x,x,,x,,],[--11,,x,x,,x,],[1--1,,,,x,x,x$