Task: Program Execution
Input (English): [-87, -65, -2, 19, -15, 49, 77, -15, -54, 61, 74, 23]
Output (English): [-76.0, -33.5, 8.5, 2.0, 17.0, 63.0, 31.0, -34.5, 3.5, 67.5, 48.5]