Consider a disk with a block size B = 512 bytes, a block pointer P = 6 bytes, and a record pointer PR = 7 bytes. Suppose, file has r = 30000 EMPLOYEE records of fixed length. Each record has following attributes: Name (30 bytes); Ssn (9 bytes); Department code (9 bytes); Address (40 bytes); Phone (10 bytes); Birth_date (8 bytes); Sex (1 byte); Job_code (4 bytes); Salary (4 bytes); Additional byte is used as a deletion marker. a. (5 pts) Assuming an unspanned organization, calculate the record size R (in bytes), blocking factor bfr, and the number of file blocks b. R= bfr =