You need to send your 16-digit credit card number to your agent through email. Since writing the card number in textual form may not be secure, you decide to hide this number in 4x4 grayscale (8-bit) image. i. Show a block diagram indicating the steps that you will follow to perform this operation. (4) ii. Assuming that the value of the first pixel in the image is 255, what would be the value of this pixel if you hide a value of 2 in it? (4) iii. What operation your agent will need to perform to extract the credit card number?