A rope, under a tension of 200 N and fixed at both ends, oscillates in a second-harmonic

Question:

A rope, under a tension of 200 N and fixed at both ends, oscillates in a second-harmonic standing wave pattern. The displacement of the rope is given by y = (0.10 m) (sin πx/2) sin 12πt, where x = 0 at one end of the rope, x is in meters, and t is in seconds. What are
(a) The length of the rope,
(b) The speed of the waves on the rope, and
(c) The mass of the rope?
(d) If the rope oscillates in a third-harmonic standing wave pattern, what will be the period of oscillation?