Problem $1(3\mathrm{.}75$ Points$)$

Calculate the number of bytes in the following images

a$)10241024$ digital $8$ bits gray$-$scale image?

b$)640480$ digital $24$ bits gray$-$scale image?

c$)200225$ digital $16$ bits RGB image?

Problem $2(3\mathrm{.}75$ Points$)$

For the following three colors RGB image, calculate the followings:

a$)$ Bit$-$depth.

b$)$ Size in bytes of pixel colour ${}^{}$ information.

c$)$ Total size in bytes of the image file.