Task: Program Execution
Input (English): [28, -7, -81, -54, 81, 81, 66, 28, 31, 50, 11, 34]
Output (English): [10.5, -44.0, -67.5, 13.5, 81.0, 73.5, 47.0, 29.5, 40.5, 30.5, 22.5]