1- If you use a binary notation 0101 to represent the gray level of a pixel in a grayscale image, how many bits are in the binary notation?

a. 1

b. 2

c. 4

d. 1

2 - If you use a binary notation 0101 to represent the gray level of a pixel in a grayscale image, how many values this number of bits can represent?

a. 4

b. 8

c. 16

d. 32

3 - If there are in total 8 gray levels, how many bits are needed at least?

a. 3

b. 2

c. 5

d. 4