Q6

The table below is an "Excel-like" sheet representing the information on research projects conducted by researchers at a university. Project_ID Project_Name Leader_D Leader_Name Leader_Budget Member_ID Member_Name Member_Budget Total_Budget A001 AI 1001 J. Smith 5000000 1010 W. Kim 1000000 6800000 1011 S. Tanaka 800000 A002 loT 1011 S. Tanaka 4000000 1001 J. Smith 500000 6300000 1033 K. Singh 1200000 1045 R. Brown 600000 Each research project is conducted by a project leader and project members. A project leader is assigned to each research project. Multiple research members involve with a research project. A researcher can be a project leader for only one research project, while he or she can be a research member of other projects. Research budgets are allocated to project leaders and project members. For example, a project leader for a project "AI" is "J. Smith" who has the budget of 5 million JPY. "W. Kim" and "S. Tanaka" are research members for "AI", having the budget of 1 and 0.8 million JPY respectively. Total budget for "AI" is 6.8 million JPY, summing up the individual budgets allocated to the leader and members. The project leader "J. Smith" is also a research member of another project "IoT". A relational schema to represent this information can be as follows (keys are not indicated). Projects(prj_id, prj_name, leader_id, leader_name, leader_budget, mem_id, mem_name, mem_budget, total_budget) Regarding this relation, answer the following questions. (1) Explain what is "update anomaly" by showing an example of updating one of the values in the relation. (2) List up all functional dependencies with describing their reasons. (3) Identify the candidate key(s). (4) Identify the best normal form that this relation satisfies. (5) Decompose this relation into BCNE. (6) Verify that the decomposed relations can represent the following situations. A) A project leader is assigned to each research project. B) Multiple research members involve with a research project. C) A researcher can be a project leader for only a research project (7) Make an analysis on how the "Total_Budget" attribute should be dealt with