$3.$ A file having $10000$ records is stored on the magnetic disk which is described in the $\backslash (1^\{\backslash$text $\{$st $\}\}\backslash )$ question. The records of the file have fixed size; each record occupies $200$ bytes, and each record is entirely contained in a single block $($no record is contained partly in one block, and partly in another$).$ Answer the following questions:

a$)$ Compute number of records that can be stored in $1$ block.

b$)$ Compute number of blocks required to store the whole file.

c$)$ How many cylinders are required to store the whole file?

d$)$ If this file is organized as a heap file, and all the blocks of the file are adjacent, calculate the time required to read the whole file starting from beginning to end.

e$)$ If this file is organized as a heap file, but all the blocks of the file are randomly located on the disk platters, calculate the time required to read the whole file starting from beginning to end.