Task: Program Execution
Input (English): [47, 74, 23, -89, -39, -28, 71, -29, 5, -40, 48, -34, -57, 26, 17]
Output (English): [60.5, 48.5, -33.0, -64.0, -33.5, 21.5, 21.0, -12.0, -17.5, 4.0, 7.0, -45.5, -15.5, 21.5]