Task: Program Execution
Input (English): [77, -72, 33, -74, 50, -53, 13, -2, 48, 29, -55, 6]
Output (English): [2.5, -19.5, -20.5, -12.0, -1.5, -20.0, 5.5, 23.0, 38.5, -13.0, -24.5]