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