You will use the Random class to generate random numbers. It is important to use different Random objects for different purposes in your code, e.g. one for annealing, and one for the random variation of the parameters.  

What energy formula do minimize for finding the best fit?

Let us suppose that you run the fitting algorithm with . Can the fit ever converge?

What is in the picture below?

A person on the street approaches you and says that if you have a coil with self-inductance , its impedance at angular frequency is . What do you think?

How difficult were the programming exercises in the first class for you? Rate the difficulty on a scale from 1 to 5.