Task: Program Execution
Input (English): [-19, 50, -17, -23, -4, 9, -84, 34, -9, -82, 97, 37, -51]
Output (English): [15.5, 16.5, -20.0, -13.5, 2.5, -37.5, -25.0, 12.5, -45.5, 7.5, 67.0, -7.0]