$1.$ Edra started to create named ranges in the worksheet and has asked you to complete the work. Create a defined name for the quarterly walkup values using Walkup as the range name.

$2.$ In a similar way, create names for the other sales categories' quarterly values using the categories as the range names.

$3.$ Modify the quarterly sales totals by using the existing defined names Q$1\_$Sales, Q$2\_$Sales, Q$3\_$Sales and Q$4\_$Sales

$4.$ Change the existing defined name from Total to Totals$\_2021.[$Mac Hint: Delete the existing defined name "Total" and add the new defined name.$]$