To prepare Matlab source code and one report

Learning Goal: I’m working on a mathlab multi-part question and need an explanation to help me learn.

1. Three test results with different postfix strings.

2. Using the method of steepest descent or ascent to write 2D polynomial program.

3. Using Matlab program code to explain curve fitting by polynomial curve, cubic spline and Lagrange’s interpolating polynomial or Newton’s interpolating polynomial.