Task: Program Execution
Input (English): [-48, 55, -78, -11, -87, -51, 6, -74, 77, 80, -51, 11]
Output (English): [3.5, -11.5, -44.5, -49.0, -69.0, -22.5, -34.0, 1.5, 78.5, 14.5, -20.0]