Two waves are traveling simultaneously down a long Slinky. They can be represented by Ï1 (x, t) = 0.0030 sin(6.0x - 300t) and Ï2 (x, t) = 0.0030 sin(7.0x - 250t). Distances are measured in meters and time in seconds. (a) Write the expression for the resulting wave. (b) What are the phase and group velocities? (c) What is Îx between two adjacent zeros of Ï? (d) What is Îk Îx?