Please I need help with writing this matlab code for question 2.b), so please help me with this also please include comments explaining the code and providing detail to it that explains what is do what and what does this variable represents, etc.

(b) When we write the expression limnf(n)=L, this really means that "we can force f(n) to be as close to L as we like, provided we take n sufficiently large n. Write MATLAB code that takes as input a function f, a limit L, and an error threshold err, and returns the first value n for which f(n)L