SOLUTION: How do I find the element of a(base 1),(base 2)? 1 2 3 4 5 6 7 8 9

You shouldn't put the word "base" there. You should put "row 1" 
instead of "base 1" and "column 2" instead of "base 2". The 
first number in , the , is the row number 
going from top to bottom, and the second number  is the 
column number going from left to right.  You can remember which
is which by remembring that  looks like the word 
"arc".  

          C C C 
          O O O 
          L L L
          U U U
          M M M
          N N N
          # # # 
          1 2 3 
          ¯ ¯ ¯ 
ROW #1 ® 1 2 3 
ROW #2 ® 4 5 6 
ROW #3 ® 7 8 9

The 1 is in ROW #1 and COLUMN #1, so 1 is the element 
The 2 is in ROW #1 and COLUMN #2, so 2 is the element 
The 3 is in ROW #1 and COLUMN #3, so 3 is the element 
The 4 is in ROW #2 and COLUMN #1, so 4 is the element 
The 5 is in ROW #2 and COLUMN #2, so 5 is the element 
The 6 is in ROW #2 and COLUMN #3, so 6 is the element 
The 7 is in ROW #3 and COLUMN #1, so 7 is the element 
The 8 is in ROW #3 and COLUMN #2, so 8 is the element 
The 9 is in ROW #3 and COLUMN #3, so 9 is the element 

Your answer is the red one.

Edwin