There is no specific layout requirement. Each question should be answered separately, either numbered or with the use of sub-headings. An Executive Summary and Conclusion are not required.
You can answer the questions without further reading ,but to improve your answers you may want to reference
may not be obvious from the case study.
In answering question 2, please stick to the timeline guide as the marks will be allocated between the parts. You can repeat your statements in the different sections if they are relevant.