Task: Program Execution
Input (English): [-57, -62, -69, -90, 60, 65, -21, -57, -50, 38, -48, 78, -20, 97, 28]
Output (English): [-59.5, -65.5, -79.5, -15.0, 62.5, 22.0, -39.0, -53.5, -6.0, -5.0, 15.0, 29.0, 38.5, 62.5]