Task: Program Execution
Input (English): [-68, -63, -45, 50, -9, 24, -55, -74, -89, 55, -68, 52, -20]
Output (English): [-65.5, -54.0, 2.5, 20.5, 7.5, -15.5, -64.5, -81.5, -17.0, -6.5, -8.0, 16.0]