i) write up to four acceptable Lewis structures for the major resonance form(s). Indicate all non-zero formal charges. Indicate which resonance form is the most important contributor when there is more than one. ii) draw the molecular geometry expected from VSEPR, and label it with the name of the geometry. iii) indicate deviation of bond angles from the ideal geometry when applicable. iv) list all symmetry operations. (b) HS2 (c) PC14(CH3) (d) triflate [CF3SO3] (staggered)