(4) (a) Calculate the number of valence electrons of NO3-and carefully draw its Lewis structure including all the lone p

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(4)
(a) Calculate the number of valence electrons of NO3-and
carefully draw its Lewis structure including all the lone pairs
andanyformal charges. (2marks)
(b) Which 3D structure would you expect theNO3-ion to have based
on the number of valence electrons?(1mark)
(c) Determine the point group for the NO3-ion and indicate all
the symmetry elements used to identify the point group on a sketch
of the anion. (2marks)
please help and write as much as possible please