Task: Program Execution
Input (English): [28, 69, -3, 2, 73, -77, 51, -74, 83, 60, -33, -5, 36]
Output (English): [48.5, 33.0, -0.5, 37.5, -2.0, -13.0, -11.5, 4.5, 71.5, 13.5, -19.0, 15.5]