VBA macro to use a drop down list, and by the selection all related columns must show and the rest be hidden.

Question

I have an excel sheet that has a dropdown list within which there are 10 tasks.

Each task has specific columns that need to be filled in, so on selection of a task from the drop down list the associated columns must show and the rest must be hidden. The same must happen each time a new task is selected from the drop down and the associated columns must show, and the others should be hidden.