Answer:
unlock the user cells and then protect the worksheet
Step-by-step explanation:
In order for Ruth's husband, Barret not to alter other cells of the worksheet files, she has to unlock the user cells and then protect the worksheet.
By unlocking the user cells and protecting the work sheet, she has prevented her husband, Barret from making a change to other cells of the worksheet.
A worksheet refers to a sheet of paper on which one performs work. The worksheet Ruth used in he home office is the computer based work sheet (software) where she keeps records of her business transactions.