databases sql mysql oracle isql plus -- 3

first of all there are the tasks of my work and i need to do concurrency questions 5 to 8 (task ii). also i need to choose another tasks to do because its group work and if you tell me which ones are easier for you i will tell them that Im going to do that ones. and task i is already done. Im going to send you assignment files. Also i will give you my oracle isql plus server account to work on it. and i cant pay more than £35 .Thank you.

Desarrollo de base de datos MySQL Oracle SQL

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