In rectangle ADEH, points B and C trisect AD, and points G and F trisect HE. In addition, AH \equal{} AC \equal{} 2. What is the area of quadrilateral WXYZ shown in the figure?[asy]defaultpen(linewidth(0.7));pointpen=black; pathpen=black;
size(7cm);
pair A,B,C,D,E,F,G,H,W,X,Y,Z;
A=(0,2); B=(1,2); C=(2,2); D=(3,2);
H=(0,0); G=(1,0); F=(2,0); E=(3,0);
D('A',A, N); D('B',B,N); D('C',C,N); D('D',D,N); D('E',E,NE); D('F',F,NE); D('G',G,NW); D('H',H,NW);
D(A--F); D(B--E); D(D--G); D(C--H);
Z=IP(A--F, C--H); Y=IP(A--F, D--G); X=IP(B--E,D--G); W=IP(B--E,C--H);
D('W',W,N); D('X',X,plain.E); D('Y',Y,S); D('Z',Z,plain.W);
D(A--D--E--H--cycle);[/asy]<spanclass=′latex−bold′>(A)</span>21<spanclass=′latex−bold′>(B)</span>22<spanclass=′latex−bold′>(C)</span>23<spanclass=′latex−bold′>(D)</span>322<spanclass=′latex−bold′>(E)</span>323