This is for my algorithm analysis class, and I needed help on the explanation of these. Will leave a thumbs up for good explanation.

How to create the cost function T(n) line by line from source code to get the total cost function.

The meaning of Order of Growth: what does O(g(n)) mean? Omega(g(n)) and Theta(g(n))?

What does it mean that they are a SET of functions and what that means in the expression is f(n) = n + 100 O(lg(n)) or Omega(lg(n) or Theta(lg(n))?

What does lg(n), log(n) and ln(n) mean and how do they differ.