The figure below shows a segment of a wave traveling on a tensioned wire in the positive x-direction. The wave speed is 60 m/s. Find the velocity at positions a, b, and c at the instant the segment was captured.

A student uses a frequency generator and an oscillator to produce a progressive wave along a string.  The string has a length of 1.2 m and a mass of 5 g. The produced wave is modeled with the wave function y(x,t) = 12 mm sin([π/2(rad/m) x] - [100π (rad/s) t]). Determine the progressive wave's i) amplitude (A), ii) frequency (f) and iii) wavelength (λ).