translate English to French: Add "d" in the intersection of row "1" and column "5.1" and column "5.1" and row "1", and add at the end of the table a new "d" as follows:
Ajouter "d" dans l'intersection du rang "1" et la colonne "5.1" et de la colonne "5.1" et le rang "1", et ajouter à la fin du tableau un nouveau "d" rédigé comme suit: