How to make dropdown visible true/ false and required true/ false? - by: sagar.toshniwal

I am making a small change in the Ticket form. Based on a particular status, I want to show Priority dropdown and make it mandatory. However, in all statuses before this, the Priority dropdown is hidden. The statuses are driven by workflow.

I could make the dropdown readOnly true or false. However, I am not getting any solution to make it visible true or false, and required true or false.

Please help.