the following fields: Name(30 bytes), Ssn(9 bytes), Department code( 9 bytes), Address ( 40 bytes), Phone( 10 bytes), Birth_date( 8 bytes), Gender(1 byte), Job_Code( 4 byles) and Salary( 4 bytes, real number). An additional byte is used as a deletion marker. 4.1. Calculate the record size R in bytes. Also calculate the blocking factor bfr and the number of file blocks b, assuming an unspanned organization. 4.2. Suppose that the file is ordered by the key field Ssn and we want to construct a primary index on Ssn. Calculate (i) the index blocking factor bfri (ii) the number of first-level index entries and the number of first-level index blocks; (iii) the number of levels needed if we make it into a multilevel index; (iv) the total number of blocks required by the multilevel index and (v) the number of block access needed to search for and retrieve a record from the file - given its Ssn value - using the primary index