An article in Talanta presented a 2 factorial design to find lead levels by using flame atomic absorption spectrometry(FAAS). Data in excel HW 6 Q4Lead.xlsx a. Construct a Normal Probability plot of the effect estimates. Which effects appear to be large? b. Conduct an analysis of variance to confirm your findings on part (a) c. Analyze the residuals from this experiment. Are there any problems with model adequacy? Lead Recv ST RC pH -1 39.8 -1 51.3 -1 -1 -1 -1 57.9 78.9 -1 78.9 -1 -1 1. 84.2 -1 1. -1 94.4 94.7 42.1 -1 -1 -1 -1 -1 48 -1 -1 58.1 -1 85.9 -1 -1 84.2 -1 1. 84.2 -1 90.9 105.3 1.