1. An incident wave y = 4 Sin(31'[ t61tx) and a reflected wave y = 4 Sin(3T[ t+ 6m) produce a standing wave. What is its equation? 2. A standing wave of equation y=6cos(6t)sin(4x) is formed from a reflected wave moving in the +x direction, and an incident wave moving in the x direction. What are the equations of the incident and reflected waves