Kindly assist me with this. It's urgent

a) You received a suspected adulterated sample of a locally made energy drink. You carried out an HPLC analysis for caffeine on the sample. A 10.1 ppm methanol Intrnal standard was introduced both into the sample and a standardized solution of 304ppm of caffeine. Detection was by a diode-array detector at each max for the absorptions for methanol and for caffeine and are summarized in the table below. What is the concentration of caffeine in that sports drink? [10 marks]