Task: Program Execution
Input (English): [20, -67, 84, -12, 36, -9, -75, -74, -8, 12, -53, -58]
Output (English): [-23.5, 8.5, 36.0, 12.0, 13.5, -42.0, -74.5, -41.0, 2.0, -20.5, -55.5]