If the answers are in scientific notation please convert!

Two sinusoidal waves, identical except for phase, travel in the same direction along a string, producing a net wave y'(x, t) = (2.10 mm) sin(35.0x - 5.20t + 0.550 rad), with x in meters and t in seconds. What are (a) the wavelength ) of the two waves, (b) the phase difference between them, and (c) their amplitude ym? (a) Number i Units (b) Number i Units (c) Number i Units