1. a35 is the value (the element) at the intersection of the 3-rd row and the 5-th column.
2. a24 is the value (the element) at the intersection of the 2-nd row and the 4-th column.
3. a13 is the value (the element) at the intersection of the 1-st row and the 3-rd column.
Good luck and remember that NOWHERE ELSE you will get better instructions !