Task: Program Execution
Input (English): [-28, -65, -53, 18, 20, -90, -72, -35, 66, 80, -83, -74, -69, -47, 7]
Output (English): [-46.5, -59.0, -17.5, 19.0, -35.0, -81.0, -53.5, 15.5, 73.0, -1.5, -78.5, -71.5, -58.0, -20.0]