My sister said to my mother, "When can I have dinner? I hardly have had anything to eat since noon today."

My sister asked my mother when she could have her dinner and said that she hardly has had anything to eat since noon that day.

My sister asked my mother when she can have her dinner and said that she hardly had had anything to eat since noon that day.

My sister asked my mother when she can have her dinner and said that she hardly has had anything to eat since noon that day.

My sister asked my mother when she could have her dinner and said that she hardly had had anything to eat since noon that day.