Need understanding the following. for example my database hold music information with entities such as songs, artist, albums etc.

list examples

list all actors (i. e. users) of your database

(b) for each actor, list all use-cases including all the steps. for each entity, you must have use cases that perform at least one aggregate query, one insert operation, one delete operation, and one update operation; for each relationship, you must have use cases that perform at least one joint query.

(c) use case realization: explain how the relations and relationships are used in each of the use cases. provide the complete sql statements for every use case.

Write a program that performs a simple n-body simulation, called "jumping leprechauns." this simulation involves n leprechauns, numberd 1 to n. it maintains a gold value g_i for each leprechaun i, which begins with each leprechaun starting out with a million dollars worth of gold, that is, g_i = 1000000 for each i = 1,. in addition, the simulation also maintains, for each leprachaun,i, a place on the horizon, which is represented as a double-precision floating point number, x_i. in each iteration of the simulation, the simulation processes the leprachauns in order. processing a leprachaun i during its iteration begins by computing a new place on the horizon for i, which is determined by the assignment: