You have a field called "Order ID$"$ in the superstore dataset.

You want to create a "year flag" using the Order ID field. If any Order ID has $"2018",$ it should be flagged as "Old," otherwise "New."

For example, CA$-2018-100006$ is an order ID$.$

"Old" would be the "year flag" for this order ID$.$

Which calculation would you use to create the "year flag" using MID function in tableau?