In: Advanced Math
| Find the least squares approximation of
 f (x)  =  7 + 3 cos(πx)  over the
interval [−1, 1] by a polynomial of the form p(x)
 =  c0 + c1x +
c2x2. | 
| (a) | Enter the polynomial p(x) into the answer box below. | 
| (b) | Find the mean square error of the approximation. |