Draw/sketch the repeat unit and compute the repeat unit molecular weights for the following: a) Polystyrene (PS) b) Polycarbonate (PC) c) Polytetrafluoroethylene (PTFE) d) Poly (methyl methacrylate) (PMMA) e) Poly (vinyl chloride) (PVC) f) Polyethylene terephthalate) (PET)