126. Solving a chemistry problem

43g. Using the data below, calculate at what value of direct current the coulometric titration of sodium thiosulfate with electrogenerated iodine should be carried out in the presence of a starch indicator, if the approximate mass of sodium thiosulfate in the solution is t mg and for the appearance of a blue color of the solution it is necessary to pass current for time τ.
What auxiliary reagent can be used in this case to obtain a titrant? Write the equations for the reactions taking place on the generator electrode and in the solution.
Option D,
M, mg 10
t, min 5