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