Zingiberene, a terpene found in ginger, has the structure shown below. Classify the π bonds in zingiberene as conjugated, cumulated or isolated.

◦ I = isolated; II = isolated; III = conjugated
◦ I = conjugated; II = isolated; III = cumulated
◦ I = isolated; II = conjugated; III = conjugated
◦ I = cumulated; II = cumulated; III = isolated
◦ I = cumulated; II = conjugated; III = cumulated