![]() January June July December Which month had the highest absorption concentration? ![]() February July August November Which month hadthe lowestabsorptionconcentration? ![]() January April September December Which month hadan absorptionlevel closest to 60ppm? ![]() 33 ppm 43 ppm 53 ppm 63 ppm Which figure appears to be the best estimate for the chemical absorption concentration in March? ![]() 71 ppm 79 ppm 81 ppm 89 ppm Which figureappears to be thebest estimate forthe chemicalabsorptionconcentrationin October? |