In the CO_2 molecule, each oxygen atom forms a double bond with central carbon atom. Given that the Bohr radius (a_o ) is approximately 0.529 A^o and the experimental C=O bond length is about 1.16 A^(o ) , calculate : a) The approximate region (in the terms of Bohr radii) where the shared electrons are most likely to be found between C and O. b) Compare the calculated bond region to the sum of the covalent radii of carbon and oxygen, and comment on the effect of π bonding on the contraction of bond length.