A researcher wants to study if the shelf height of the product may affect its sales. Test this hypothesis at the 0.05 level using the following sales data (in lpesos) of 7-day sales in a grocery store. Shelf Height Knee Level Waist Level Eye Level 77 88 84 80 94 87 81 93 82 76 87 79 79 83 78 84 90 83 86 91 85 (Requirements: Ho, Ha, alpha level, test statistic, rejection region, conclusion, post-hoc or pairwise comparison using Tukey's HSD or Bonferroni). (25 points)