Two carts of mass \(m_1\) and mass \(m_2\) are initially held at rest on a horizontal, frictionless track with a compressed spring between them. The spring is released, propelling the carts in opposite directions until they completely separate from the spring. Which row in the table correctly describes how the magnitude of the total linear momentum and the total kinetic energy of the two-cart system change from immediately before the release to immediately after the separation?