const stats = {
  max: 56.78,
  standard_deviation: 4.34,
  median: 34.54,
  mode: 23.87,
  min: -0.75,
  average: 35.85
};

// Only change code below this line
// const half = (stats) => (stats.max + stats.min) / 2.0;

const half = ({max,min}) => ((max + min) / 2.0);

console.log(half(stats));