Problem 12.1. A file contains 20000 records, each of a fixed size of 140 bytes. The file is to be stored in a disk drive having blocks of 3096 bytes with 512 bytes of inter-block gaps. If unspanned blocking is used, compute the following: a. Blocking factor (i.e., the average number of blocks per record) b. Number of blocks needed to store the 30000 records. c. Total size of the file