7 Problem #7 A stretched string that lies along the x-axis has a sinusoidal traveling wave propa- gating along it. Figure 7 shows the historyF plots for two points. one at .\"L' = Um and the other at r = 0.09m. 1. What is the amplitude of the wave?' 2. What is the period of the wave?' 3. The points .1." = Um and :r = 0.09m are within one wavelength apart. Determine the wavelength and the speed of the wave if the wave is moving towards positive in: values. 4. Determine the wavelength and the speed of the wave if the wave is moving towards negative x values. 5. If you were not told that the two points were within one wavelength apart, would it be possible to determine the exact wavelengths in parts 3 and 4? Why or why not? um) x=0 x=0.0900m Figure 3: Historyr plots for two points, one at :r = Urn and the other at r = m