Algorithms, teach me through the computer(repost)

I am learning about algorithms, about complexity analysis, finding the T(n) of problems, the big O etc. I have about 5 power-point presentation, i will pay 8$ an hour as long as it takes to go through all of them. But if you are not good then i will just pay for one hour. So this is a bid for the first hour, please do not bid if your english is not good.