Task: Program Execution
Input (English): [-27, -7, 61, 66, 78, -43, -99, 20, 71, -84, -75, -78, 17, 39, -74]
Output (English): [-17.0, 27.0, 63.5, 72.0, 17.5, -71.0, -39.5, 45.5, -6.5, -79.5, -76.5, -30.5, 28.0, -17.5]