A 61-kg snow skier is being pulled up a 128 slope by a steel cable. The cable has a cross-sectional area of 7.8 × 10-5 m2. The cable applies a force to the skier, and, in doing so, the cable stretches by 2.0 × 10-4 m. A frictional force of magnitude 68 N acts on the skis and is directed opposite to the skier's motion. If the skier's acceleration up the slope has a magnitude of 1.1 m/s2, what is the original (unstretched) length of the cable?