NPV

If there is capital rationing the the question will tell you if the projects are divisible or not (if there is not capital rationing then it is irrelevant). I don't have the Kaplan Study text so I can't help you with the second question, however our lectures are a complete course and cover everything needed to F9 - if you are watching our lectures throughout you don't need a Study Text, just an Exam Kit in order to practice exam standard questions.

You discount each of the inflows using the tables provided, and subtract the initial outflow. If you have watched the lectures then I don't really understand why you are having to ask this. Maybe I am misunderstanding your question but this is really Paper F2.

You didn't say that it was in perpetuity (and as I said, I don't have the Kaplan Study Text) :-) The discount factor for a perpetuity is 1/r where r is the discount rate.