Problem 3. Repeat problem 2 for a polynomial model of degree n. That is, X Rmxn, and 2 MSE mu 772 ;r - y j=1 i=1 Problem 2. Suppose we want to find a quadratic model to fit the data (1,3), i=1,2,..., m. Write the system of equations Xw = y, where X ERmx3, whose normal solution (XT X)-XTy minimizes the mean square error = MSE - (W1 + w I + wo y.) . m i=1