Student Instructions: This activity is an assignment and is worth 5 points. Do your work in paper, scan it and upload a pdf into the assignment titled "Ephedrine". This activity should be completed by the date indicated in the course calendar. Ephedra is a medicinal preparation from the plant Ephedra Sinica. From the natural extract, a bronchial dilator named ephedrine can be isolated. The structure of ephedrine is: a. How many stereoisomers does ephedrine have? b. Draw and name all the stereoisomers c. Research to identify which of the enantiomers has medicinal effects