📝 **Task:** Write `k_closest(points, k)` returning the K closest points to origin (sorted by distance). Print `k_closest([(1,3),(-2,2),(5,8),(0,1)], 2)`. Expected: [(0, 1), (-2, 2)] 📋 Edit the starter code. Tests run automatically. 💡 **Hint:** Re-read the theory if stuck.