Redox Reactions and Electrochemistry - Medium

When arsenic sulphide is boiled with NaOH, sodium arsenite and sodium thioarsenite are formed according to reaction:

x\,\mathrm{As_2S_3} + y\,\mathrm{NaOH} \rightarrow x\,\mathrm{Na_3AsO_3} + x\,\mathrm{Na_3AsS_3} + \frac{y}{2}\,\mathrm{H_2O}

What are the values of

x

and

y