Event $W$: 14 simple events. Event $X$: 11 simple events (none in $W$).

$Y = W \cap X = \emptyset$ (since no elements of $X$ are in $W$).

$Z = W \cup X$: $|Z| = 14 + 11 = 25$.

$|Y| < |X| < |W| < |Z|$ $0 < 11 < 14 < 25$