Question

Write procedure to insert three columns between Columns D and E

Answer 1

First go that application software where you wanna insert Columns after that follow these steps
step 1:- create a gap between both Columns i.e D and E
Step 2:- After that click on left side of the mouse and go to insert button
Step 3:- in insert dialog box there appears many features
step 4:- find insert coloumn button then the column will be inserted

Answer 2

Select the column heading to the right of where you want the new column to appear. For example, if you want to insert a column between columns D and E, select column E. ...

Click the Insert command on the Home tab. Clicking the Insert command.

The new column will appear to the left of the selected column.