First, draw a very steep slope (growing upwards, to symbolize climbing up the steep bank and then a short flat line (no slope) to symbolize his rest. Then draw a slope that's not as steep as the first (walking up a small hill) and finally and long flat line (no slope) to symbolize the flat plateau
If Kevin is 6 years older than Daniel, but also 4 times as old a him, just divide 6 by 4. Your answer is going to be that Daniel is 1 and a half years old