Show clearly the equations towards the answer, do not jump to the answer

b) Chloroform is an internal standard in the determination of the pesticide DDT in a polarographic analysis in which each compound is reduced at an electrode surface. A mixture containing 0.500mM chloroform and 0.800mM DDT gave signals of 15.3A for chloroform and 10.1A for DDT. An unknown solution (10.0mL) containing DDT was placed in a 100mL volumetric flask and 10.2L of chloroform (FM 119.39, density = 1.484g/mL ) were added