ANSWER WITH COMPLETE SOLUTION!!! ANSWER WITH COMPLETE SOLUTION!!!
1. Use natural cubic spline interpolation to approximate f(14)
2. Use quadratic least-squares method to approximate f(14).
Consider the following set of data points representing f(x):
X f(x)
4 1590
8 1320
12 1000
16 900
20 650
24 560
Suppose that f(14) will be approximated using the given data set.