1. (15 pts) You used a volumetric pipette to transfer 4.00mL aliquot of 8.00106MK3PO4 to a 500mL volumetric flask, which was diluted to the mark using deionized water and mixed thoroughly. Assuming the solution density is 1.000g/mL, what is the ppb concentration of K+ ions (K=39.0983g/mol) in the diluted solution? 2. Justin analyzed the concentration of caffeine in 1,000 samples from a soft drink company. His data fit the Gaussian curve of errors perfectly with a population mean of 22.149ppm(, true value) and a population standard deviation of 0.549ppm. ( 20 pts total; 10 pts each) A: How many samples have a caffeine concentration higher than 23.184ppm (round off the nearest whole number)? B: How many samples have a caffeine concentration between 20.121 and 22.669ppm (round off the nearest whole number)