text: 
  exports.min = function min (array) {
      if(array === undefined || array.length === 0){
          return 0;
      } 
      let minValue = array[0];
      for (let i = 1; i < array.length; i++){
          if(minValue > array[i]){
              minValue = array[i];
          }
      }
    return minValue;
  }
  
  exports.max = function max (array) {
      if(array === undefined || array.length === 0){
          return 0;
      } 
      let maxValue = array[0];
      for (let i = 1; i < array.length; i++){
          if(maxValue < array[i]){
              maxValue = array[i];
          }
      }
    return maxValue;
  }
  
  exports.avg = function avg (array) {
      if(array === undefined || array.length === 0){
          return 0;
      } 
      let sum = 0;
      for (let i = 0; i < array.length; i++){
          sum += array[i];
      }
    return sum / array.length;
  }
  