I am trying to print this sample report in pdf

so far this is what I have

1st Problem: the report should have another 2 cell (Ave and %) below the criteria which are (Exam, Progress Report, Quiz, Project)

2nd Problem: The records under the criteria, grade and remark are the same but in my database, the are not the same.

this is my code so far:
 

$sql_criteria = mysql_query("SELECT DISTINCT criteria, percentage  FROM tb_equivalent WHERE instructor_id = '$inst_id' AND description = '$desc' AND subj_code = '$code' AND term = '$term'");
	$criteria = array();
	while($row = mysql_fetch_assoc($sql_criteria)){
		$criteria[] = $row['criteria'];
		$pdf->SetFont('Arial','',9);
		$pdf->Cell(35,5,$row['criteria'],1,'','C');
		//$pdf->Cell(17.5,5,'Ave',1,'','C');
		//$pdf->Cell(17.5,5,$row['percentage']."%",1,'','C');
	}
	$pdf->Cell(35,10,'Grade',1,0,'C');
	$pdf->Cell(35,10,'Remark',1,0,'C');
	$pdf->SetFont('Arial','',9);
	$pdf->Ln();
	$sql = mysql_query("SELECT * FROM tb_equivalent INNER JOIN tb_student ON   tb_equivalent.stud_id=tb_student.stud_id WHERE tb_equivalent.instructor_id = '$inst_id' AND tb_equivalent.description = '$desc' AND tb_equivalent.subj_code = '$code' GROUP BY tb_equivalent.stud_name ORDER BY stud_lname ASC");
	while($row = mysql_fetch_array($sql)){
		$name = $row['stud_name'];
		$course = $row['course_and_year'];
		$pdf->SetFont('Arial','',9);
		$pdf->Cell(1);
		$pdf->Cell(40,4,$name,1);
		$pdf->Cell(20,4,$course,1,0,'C');

		for($x = 0; $x < count($criteria); $x++){
			$query_rec = mysql_query("SELECT * FROM tb_equivalent INNER JOIN tb_student ON tb_equivalent.stud_id=tb_student.stud_id WHERE tb_equivalent.instructor_id = '$inst_id' AND tb_equivalent.criteria = '".$criteria[$x]."' AND tb_equivalent.description = '$desc' AND tb_equivalent.subj_code = '$code' AND tb_equivalent.term = '$term' ORDER BY stud_lname ASC");
			$record = mysql_fetch_array($query_rec);
			$pdf->Cell(17.5,4,$record['average'],1,0,'C');
			$pdf->Cell(17.5,4,$record['equivalent'],1,0,'C');
			
		}
		$query_grade = mysql_query("SELECT grade, remark FROM tb_record_grade WHERE instructor_id = '$inst_id' AND description = '$desc' AND subj_code = '$code' AND term = '$term'");
		$row_grade = mysql_fetch_array($query_grade);
		$pdf->Cell(35,4,$row_grade['grade'],1,0,'C');
		$pdf->Cell(35,4,$row_grade['remark'],1,0,'C');
		$pdf->Ln();
	}