Please begin your response tweets with A1 for an answer to question 1, A2 for an answer to question 2 and so forth, to let us know which questions you are answering
Felly wrth ymateb nodwch A1 i ateb cwestiwn 1, A2 i ateb cwestiwn 2 ac yn y blaen, er mwyn i ni wybod pa gwestiwn sydd dan sylw.