Question (3)- A metallurgy company wanted to investigate the effect of the percentage of ammonium and the stir rate on the density of the powder produced. The results are as follows: (Excel File: Density) Stir Rate Ammonium (%) One Hundred One Fifty Two 10.95 7.54 Two 14.68 6.66 Two 17.68 8.03 Two 15.18 8.84 Thirty 12.65 12.46 Thirty 15.12 14.96 Thirty 17.48 14.96 Thirty 15.96 12.62 At the 0.05 level of significance, a. is there an interaction between the percentage of ammonium (A) and the stir rate (B)? b. If in part a you rejected Ho hypotheses, follow the Tukey procedure to find the different mean(s). Note: For doing One-Way ANOVA, use Excel and only report the result table (Week 9 lecture, Slide 34 table). Note: It is not necessary to submit your excel file for this question. *Please show the calculation steps completely (Solve ANOVA by hand). *Please interpret the final decision as discussed in slides