A water sample is analyzed for Cd concentration using atomic absorption spectroscopy. Using calibration standards between 0.2 and 1.0 ppm, the equation for the calibration line was determined as: X = 0.431C 0.011 where X = absorbance and C = concentration (in ppm). The water sample is prepared by transferring 5.00 mL of water to a 100.0 mL volumetric flask and diluting to the line. a) If the diluted water sample gives an absorbance of 0.107. Calculate the concentration of Cd in the diluted water sample. b) What was the concentration of Cd in the original water sample (in ppm)? c) Was the diluted water in the best range to determine its concentration? If not, please suggest a better dilution ratio.