References for answering the feedback questions for ORE 1

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Dear Everyone Who Is Preparing For September Ore part 1: Please please please can we all provide references when we are solving any feedback question, so everyone can believe and benefit from the provided answer and more effective way to study is achieved and to avoid any further confusions by attaching documents,links or at least stating the page number from the book which has the answer or the source, rather than throwing the answer without knowledge and background, since the questions on the exam are TRICKY. It will be much much much appreciated and thank you in advance More opinions on this are welcome Ayham Sbahi