The accompanying data file contains 35 observations for an ice cream truck driver’s daily income (Income in $), number of hours on the road (Hours), whether it was a particularly hot day (Hot = 1 if the high temperature was above 85°F, 0 otherwise), and whether it was a Holiday (Holiday = 1, 0 otherwise). Consider two models where Model 1 predicts Income on the basis of Hours, Hot, and Holiday and Model 2 also includes the interaction between Hot and Holiday. Use the holdout method to compare the predictability of the models using the first 24 observations for training and the remaining 11 observations for validation.