15.3 The histogram table for a 3-bit image is given in Table 15.7.

a. How many pixels are in the image?

b. Sketch the histogram for the image.

c. If all the black pixels are changed to white, and if gray scale level 6 is changed to 5, what is the effect on the histogram?

Table 15.7

Gray Scale Level	Number of Pixels
0	950
1	600
2	350
3	400
4	450
5	500
6	300
7	300