text: 
  exports.min = function min (array) {
      if (array === undefined || array.length === 0) {
          return 0;
      }
    return Math.min(...array);
  }
  
  exports.max = function max (array) {
      if (array === undefined || array.length === 0) {
          return 0;
      }
    return Math.max(...array);
  }
  
  exports.avg = function avg (array) {
      if (array === undefined || array.length === 0) {
          return 0;
      }
    return array.reduce((prev, curr) => prev + curr) / array.length;
  }
  