Solve the all parts of given problem:
Problem: Adjacent antinodes of a standing wave on a string are 20.0 cm apart. A particle at antinodes oscillates in simple harmonic motion with amplitude 0.770 cm and period 0.0765 s. The string lies along the x-axis and is fixed at x = 0.
Part A: How far apart are the adjacent nodes?
cm
Part B: What are the wavelength, amplitude, and speed of the two traveling waves that form this pattern?
Please keep answer short and simple and please no copy and paste.