The wave function is given by A(x)=0.15sin(4x). The document determines the amplitude, wavelength, locations of the first four nodes and antinodes, and the first point where the amplitude is 0.1m. The amplitude is 0.075m, the wavelength is 1.57m. The first four nodes are at x=0, 0.785m, 1.57m, 2.4m. The first four antinodes are at x=0.39m, 1.18m, 1.96m, 2.75m. The first point where the amplitude is 0.1m is 0.18m.