4) Take the cameraman image (standard test image of MATLAB). a) Determine the sample entropy of this image b) Get a Huffman coder (from internet). Apply to cameraman image, and determine the compression ratio. c) Now, apply the ZIP operation, find the compression ratio. d) Finally, Find the JPEG-LS (LOCO) coder from the internet. This is a lossless coder tuned for images. Apply it to the cameraman image, determine the compression ratio. Comment on your observations. Why are the first three methods inefficient? e)