Question: Using (K)-fold cross-validation, find the value of (lambda) that gives the best predictive performance on the Olympic men's (100 mathrm{~m}) data for (a) a firstorder

Using $K$-fold cross-validation, find the value of $\lambda$ that gives the best predictive performance on the Olympic men's $100 \mathrm{~m}$ data for

(a) a firstorder polynomial (i.e. the standard linear model) and

(b) a fourth-order polynomial.

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