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Pls answer asap!

Q29) Which of the following are true: (note: possible mulliple answers) 1) Observer Pattem - Without changing code we can add or tamove tistinners. 2) Open Closed Principle - open for extension closed for modificalion 4) Strategy - Encapsulate changing behavior in a class. 4) Favor Composition Over Inheritance -Inheritance more coupled than composition 5) Originator-Creates the memento Q29) Q30) This pattern is most common with Web Servers: A. N tier B. Three tier architecture C. Pipe filter D. MVC E. Strategy Q30)