text: function solve(){
      return function (students) {
          var student = _.chain(students).map(function(item){
              item.fullName = item.firstName + ' ' + item.lastName;
              var sum = 0,
                  i,
                  len;
              for(i = 0, len = item.marks.length; i < len; i += 1){
                  sum += item.marks[i];
              }
  
              item.averageMark = sum/len;
              return item;
          }).sortBy('averageMark').last().value();
          console.log(student.fullName + ' has an average score of ' + student.averageMark);
      };
  }
  
  module.exports = solve;