$.$ Consider a disk with block size B$-512$ bytes. A block pointer is P$-6$ bytes long and a recordPor PR$-$T bytes long. A file has r$=30,000$ EMPLOYEE records of fixed$-$length. Each record has the following fields: NAME $(30$ bytes$),$ SSN $($bytes$),$ DEPARTMENTCODE $(9$ bytes$),$ADDRESS $(40$ bytes$).$ PHONE $(9$ bytes$)$ BIRTHDATE $(8$ bytes$),$ SEX $(1$ byte$),$ JOBCODE $(4$ bytes, SALARY $(4$ bytes, real number$).$ An additional byte is used as a deletion marker$\mathrm{.}1)$ Calculate the record size R in bytes,$(1)$ Calculate the blocking factor bir and the number of file blocks b assuming an unspanned