You need to design a data storage scheme for hayseed heaven library data system. there are several hundred thousand large data records. you expect frequent insertions/deletions as well as frequent queries, involving multiple attributes. there is no requirement for printing the file in order. you may assume the initial file is available sorted. the queries are in real time and primarily occur on the isbn number, title, and author fields. there are occasional queries on the publisher and subject fields of the record. you may make reasonable assumptions about hardware availability. the entire system is archived monthly. what do you propose and why?