Section A

$($a$)$ Given that a digital image has the following properties:

Resolution: $19201080$ pixels

Color depth: $8$ bits $($grayscale image$)$

$($i$)$ Calculate the total number of colors that can be represented in this digital image.

$(2$ marks$)$

$($ii$)$ Compute the size of this digital image in MB and MiB.

$(4$ marks$)$

$($iii$)$ Calculate the time $($in second$)$ required to transmit this image at the transmission rate of

$5$ Mibps.

$(2$ marks$)$

$($iv$)$ If you are given a portable disk with capacity of $500GB,$ how many images with the

above size can be stored?

$(2$ marks$)$

$($b$)($i$)$ In the information technology area, explain the difference between the terms "data" and

"information".

$(2$ marks$)$

$($ii$)$ Sampling and quantization are two key operations to convert analog signals to digital

signals. Explain the functions of these two operations.

$(2$ marks$)$

$($iii$)$ Provide two examples of the primary storage.

$($c$)$ Find the binary and octal representations of decimal number $975.$