11. Model selection and Prediction Error. [a] (2 marks) A sample and two tted functions are displayed in the graphs below. Based on this which function do you prefer? Why? mul'lat (degree=2] on 5 rnuhat {degraa=2} an 5 'Q '3! D D a N. o a: a; N s C} t to. w. I? C: 1350 1900 1950 2000 1850 19m 1950 20m (h) (1 marks) Why are many samples preferred than a single sample when calculating the prediction error? [c] (3 marks) Describe lofold crossvalidation