Statement 1 : In the redox reaction

$8{\mathrm{H}}^{+}\left(\mathrm{aq}\right) + 4{\mathrm{NO}}_3^{-} + 6 {\mathrm{Cl}}^{-} + \mathrm{Sn}\left(\mathrm{s}\right) \stackrel{ }{\to } {\mathrm{SnCl}}_6^{2-} + 4{\mathrm{NO}}_2 + 4{\mathrm{H}}_2\mathrm{O}$

the reducing agent is Sn(s).

Statement 2 : In balancing half-reaction, ${\mathrm{S}}_2{\mathrm{O}}_3^{-2} \to \mathrm{S}\left(\mathrm{s}\right)$, the number of electrons added on the left is 4.