advanced physics introduction to ocean waves 1

Only problems 2-5 are needed. No need for problem1. Chapter 6 or 7(i’m not sure which one it is) in the textbook I’m providing might be helpful and contain most of the contents you need to know. The problems should be easy if you read the chapter, but I don’t have time to read or study it Really need it to be done in 12 hrs and please guarantee the correctness as much as you can. Thanks a lot:)