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