(a) HSV/HSL can be visually transformed from the RGB colour model. (i) Draw the RGB cube colour model with coordinate labels of the fundamental colour on each of the cube-corner. [4 marks) (ii) Derive the HSV/HSL colour space transformation from RGB colour cube. [8 marks) (b) You have an image with 640 x 480 pixels in 24-bit RGB colour to be compressed by using the YCbCr model with 4:1:0 chrominance subsampling. (i) Illustrate the mentioned chrominance subsampling model by using a 4x4 pixel image. [3 marks) (i) Determine the compression ratio of the given image. [6 marks] (iii) Given that, in one of the pixels of the image, the value of [RG B] = [100 150 200), convert the pixel colour space into YCbCr. [4 marks]