When the system first launched, the performance of LawTrax was good, because not much data was present. As time has gone on, however, system performance has gradually decreased to the point where it is now unbearably slow, and the system has become mostly unusable. The law firm has hired you as a consultant to urgently help fix the performance issues. To your horror, a quick scan of the databases metadata reveals that the database has no indexes except the ones automatically created by the database. The database designer created no indexes at all! You quickly get to work deciding where to place the indexes. 1. To get started, list out all of the primary key columns in the schema. These have already been indexed by the database. Identify them using the standard tablename.columnname format as used in Examples 2 and 3 in the first section. 2. Next, you need to identify all of the foreign key columns in the schema. As described in the first section, these all need to be indexed. You will need to decide whether to make them unique indexes, or non?unique indexes. List out all foreign key columns in tablename.columnname format, indicate for each whether a unique or non?unique index is needed, and explain your choice. 3. You have been provided with some queries by the development team; they are a good resource to continue your index work. Indicate which columns would need to be indexed for the given queries using the tablename.columname format. Make sure to indicate whether the indexes should be unique or non? unique, and to explain your choice. 4. At this point, you have seen a couple of queries used by the system, and have read a description of what the system does. Your next step is to identify all remaining columns that should be indexed based upon this information. You may recall that the original database designer did not index any columns, so all remaining columns should be considered. In order to accomplish this, you will need to make reasonable assumptions about what kinds of queries the system uses in order to do its work. State your assumptions, then list all additional columns (in tablename.columnname format) that need an index. Explain why the index is beneficial, taking into account the factors described in the first section. Also identify whether the index should be unique or non?unique, and justify that choice.