Task: Program Execution
Input (English): [-10, -80, -83, -35, -1, -88, 12, 45, 59, -67, 17, -9, -15]
Output (English): [-45.0, -81.5, -59.0, -18.0, -44.5, -38.0, 28.5, 52.0, -4.0, -25.0, 4.0, -12.0]