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