4. Four of the candidate terpene structures in Figure 1 contain rings. Which one of these can exist as both cis and trans stereoisomers? Draw all the stereoisomers using filled and dashed wedges, as appropriate. (1.5 pts) 5. Which of the eight candidate terpene structures in Figure 1 possess stereogenic carbons? Draw them and mark each stereocenter with a asterisk (*). (2 pts) 6. (a) Would you expect the IR spectra of enantiomers to be different? Why or why not? (1 pt) (b) Would you expect the IR spectra of diastereomers to be different? Why or why not? (1 pt)