[Questions 4 - 7 reference the built-in dataset PlantGrowth] Crop one question at a time ariable weight with breakpoints (bin edges) at every 0.4 units, starting at 3.4. 5. Make boxplots of weight separated by group. Based on the boxplots, approximately what percentage of the "trt1" weights are below the minimum "trt2" weight? 6. Calculate exactly the percentage of the "trt1" weights that are below the minimum "trt2" weight. 7. Make a barplot of the variable group, but only include plants with a weight above 5.2. Make the barplot colorful using one of the R color palettes (try running ?heat. colors and/ or check out https://www.r-bloggers.com/palettes-in-r/]