Part A

GIF Compression Table

8 Bit - 256 color palette (file size: 29 KB)
7 Bit - 128 color palette (file size: 26 KB)
6 Bit - 64 color palette (file size: 22 KB)
5 Bit - 32 color palette (file size: 20 KB)
4 Bit - 16 color palette (file size: 16 KB)
3 Bit - 8 color palette (file size: 14 KB)
2 Bit - 4 color palette (file size: 11 KB)
1 Bit - 2 color palette (file size: 6 KB)

The best image to use is the 6 Bit, 64 color GIF. The quality of the image has no big different from 8 Bits, 256 color, yet it saved 7KB of size. At 5 Bits 32 colors, the color looks similar or lower quality but the details of the picture begin to lost dramatically and it does only 2 KB of saving from the 6 Bits picture.

Part B

JPEG Compression Table

Maximum Quality; lowest compression (File size: 28 KB)
High Quality; moderate compression (File size: 16 KB)
Medium Quality; high compression (File size: 8 KB)
Lowest Quality; maximum compression (File size: 5 KB)

The best image to use is the medium quality, high compression JPG. The image quality is almost the same compared to the maximum quality, low compression file, but still has an acceptable level of depth and richness, accurate and sharp image. It saves about 20 KB over the low compression version. The maximum compressed file will save 5 KB more from the medium quality picture, but the lost of sharpness makes the picture becoming blur.