Consider an EMPLOYEE file with 10000 records where each record is of size 80 bytes. The file is sorted on employee number (15 bytes
long), which is the primary key. Assuming un-spanned organization, block size of 512 bytes and block pointer size of 5 bytes, compute
the number of block accesses needed for retrieving an employee record based on employee number if (i) No index is used (ii) Multi-level
primary index is used.