Always attempt the problem without assistance for at least 30 minutes.
"The manual tells us that distance ($d$) and frequency ($f$) are her enemies. The further she goes, the quieter she becomes. Problem 3.2 asks you to calculate how loud she has to shout to be heard 10 kilometers away. The manual doesn't just give you a number; it shows you the slope of her decay. It tells you that high frequencies die faster in open space. That’s the first tragedy of our story: The faster we try to send data (higher frequency), the more fragile Alice becomes." Always attempt the problem without assistance for at