#6. In a lithium ion battery that is discharging to power a device, for every Li* that inserts into the lithium cobalt oxide electrode, a Co4* ion must be reduced to Co to balance charge. (a) Using a reliable resource, report the ionic radii of Lit, Co+, and Co4. Provide the citation. (b) Will the lithium cobalt oxide cathode (electrode) expand or contract as lithium ions are inserted