Buyers

$VAR1 = \'%grade1';
$VAR1 = \'%grade2';
$VAR1 = {
          'Lale' => {
                      'quiz1' => '79',
                      'quiz3' => '62',
                      'quiz2' => '31'
                    },
          'Peter' => {
                       'quiz1' => '21',
                       'quiz3' => '42',
                       'quiz2' => '34'
                     },
          'Bugra' => {
                       'quiz2' => '32',
                       'quiz1' => '49',
                       'quiz3' => '57'
                     }
        };
$VAR1 = \undef;
$VAR1 = \undef;
$VAR1 = {
          'Lale' => {
                      'quiz1' => '79',
                      'quiz3' => '62',
                      'quiz2' => '31'
                    },
          'Peter' => {
                       'quiz1' => '21',
                       'quiz3' => '42',
                       'quiz2' => '34'
                     },
          'Bugra' => {
                       'quiz2' => '32',
                       'quiz1' => '49',
                       'quiz3' => '57'
                     }
        };
Name	Marks 1	Marks 2
%grade1	?	?	
%grade2	?	?