Thank you very much... It did not help. When I clicked a few cells, Table Design didn't open on the ribbon. See example below.

Hello Brenda.
The reason for that is because you're not in a Table.
Look at the bottom right-hand corner of my image and compare it to the bottom right-hand corner of your image. Can you see the difference?
To create a Table click somewhere in the range you've shown (say cell B 3) then hit:-
CTRL + T
EXCEL will then pop up a window identifying your range (you can change this at this point if required) then hit:-
OK
Your Range will then be converted to a Table.
Now follow my previous instructions and I think you should now be OK.