2. a.Colour formation principles or algorithms are important in multimedia data in images and output screens. Using the RGB colour representation scheme critical explain how a 16 bbp image can be represented on a computer screen, Using any two colours of your choice explain how the colours can be represented in a Hexadecimal colour code format b. Why is a 8 bpp (bit per pixel) image also known as mid-point or grayscale image and briefly explain the principle of sound once created lives and dies c. With the aid of proper diagrams, critically explain the principle of Doppler Effect in sound. d. A document contains letters A through to Fwith frequencies ratios indicated in the table below LETTERS FREQUENCY RATIO B C D 0.2 0.3 0.2 0.1 0.1 0.1 E F Using Huffman Coding algorithm create the Huffman tree, calculate the Huffman code for each character, Calculate the average word length word