1. The problem statement, all variables and given/known data See pictures. There are 2 parts to the problem but I can probably figure out the second part once I get the first part. 2. Relevant equations Antinodes (minimum pressure) at Nodes (maximum pressure) at Equation for a standing wave: 3. The attempt at a solution Other than what I've written above, and that it's sinusoidal, not sure what the problem is looking for here. Any hints would be highly appreciated. Thanks for looking.