STAT 462 - Applied Regression Analysis Homework 9 Prepare a short report in either R Markdown or Word with relevant output, your comments, and answers to the questions (this does not need to be exhaustive or polished but should contain enough to show that you completed all tasks and analyses). Part 1. Consider again the dataset bears.txt used in previous HWs. This contains variables measured on n=141 "bear capturing" occasions: ID: Identification number Age: Bear's age, in months Month: Month when the measurement was made. Sex. 1 = male 2 = female Head.L: Length of the head, in inches Head.W: Width of the head, in inches Neck.G: Girth (distance around) the neck, in inches Length: Body length, in inches Chest.G: Girth (distance around) the chest, in inches Weight: Weight of the bear, in pounds Obs.No: Observation number for this bear. For example, the bear with ID=41 (Bertha) was measured on four occasions. The value of Obs.No goes from 1 to 4 for these observations Name: The names of the bears given to them by the researchers. Consider only the first observation for each bear (bears_indep=bears[bears$Obs.No==1,]). Consider a multiple linear regression with the response y="Weight" and predictors x1="Head.L", x2="Head.W", x3="Neck.G", x4="Length