Task: Program Execution
Input (English): [30, 49, -45, -97, 3, -15, -29, -82, 89, -27, 74, -39, -38]
Output (English): [39.5, 2.0, -71.0, -47.0, -6.0, -22.0, -55.5, 3.5, 31.0, 23.5, 17.5, -38.5]