a) (1 point) Draw the molecules and examine their 3-D structures. Briefly comment on (or sketch) their 3-D shapes. /\\/\\ naphthalene phenathrene benzophenanthrene [5]he|icene b) (1 point) At what point (how many aromatic rings) does helicity arise in the series of arenes? c) (1 point) Why do you think the phenyl rings adopt this orientation? To help answer this question, use the \"van der Waals spheres\" display mode (\"display settings\" menu). Give a brief explanation