A block of mass 13.9 kg slides from rest down a frictionless 40.0° incline and is stopped by a strong spring with a spring constant 32.3 kN/m (note the unit). The block slides 7.80 m from the point of release to the point where it comes to rest against the spring. When the block comes to rest momentarily, how far has the spring been compressed? Answer in units of cm and use 9.8 m/s2 for g.