The reaction of sulphur in alkaline medium is given below: S_8( s ) + a OH^-_( aq ) → bS^2-_( aq ) + cS_2 O_3^2-_( aq ) + d H_2 O_( l ) The values of…

The reaction of sulphur in alkaline medium is given below : $$\mathrm{S}_{8(\mathrm{~s})}+\mathrm{a} \mathrm{OH}^{-}{ }_{(\mathrm{aq})} \longrightarrow \mathrm{bS}^{2-}{ }_{(\mathrm{aq})}+\mathrm{cS}_2 \mathrm{O}_3^{2-}{ }_{(\mathrm{aq})}+\mathrm{d} \mathrm{H}_2 \mathrm{O}_{(\mathrm{l})} $$ The values of ' $\displaystyle a$ ' is \_\_\_\_. (Integer answer)