itextsharp having problem with table width

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C#

table

itextsharp

this is how i create my table, the table is created and post into pdf. this table have 5 rows and 5 columns.
the problem i having is the table showing at the top of the pdf, i have some title and description at the top, how can i manually set the position of the table?

and also how can i resize the width of each column?

PdfPTable table = new PdfPTable(5);
PdfPTable pdft;
            
for (int j = 1; j < 6; j++)
{
   for (int i = 1; i < 6; i++)
   {                    
       pdft = new PdfPTable(1);
       pdft.WidthPercentage = 100f;
       pdft.DefaultCell.Border = 0;
                    
       pdft.AddCell("C" + j.ToString() + i.ToString());
                    
       table.AddCell(pdft);
   }
}
pdfDoc.Add(table);