Below are my optimized files for the Photoshop "Autoscopy [2]" assignment...
Compression Attributes: PNG-24, Optimized with Bicubic Resampling
Compression Attributes: Jpeg Quality 100, Optimized with Bicubic Resampling
Compression Attributes: Jpeg Quality 40, Optimized with Bicubic Resampling
Compression Attributes: Jpeg Quality 5, Optimized with Bicubic Resampling
Compression Attributes: Gif with 128 Perceptual colors with 100% Dither, Optimized with Bicubic Resampling
Compression Attributes: Gif with 24 Adaptive colors with 45% Dither, Optimized with Bicubic Resampling
Compression Attributes: Gif with 8 Greyscale colors with 0% Dither, Optimized with Bicubic Resampling