MS Excel
We can save and protect the workbook by

Any of the above
Protection Password
Read-only Recommended
Write Reservation Password

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MS Excel
How do you delete a column?

Right click the column heading you want to delete and select delete from the shortcut menu
Select the column heading you want to delete and select Insert Delete from the menu
Select the row heading you want to delete and select Edit>Delete from the menu
Select the column heading you want to delete and select the Delete Row button on the standard toolbar

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