Task for CAD

Look at: 'Black and White Conversion methods' label and change one of your own colour digital photographs in this way. Then choose another way of converting colour into Black and White in Photoshop and change the same photo again. Compare the results, consider which one is better and explain why. In particular consider the tonal value, does the picture have many tones between the darkest black and the lightest white? Is one result more evocative than another?