Im only in 4th sorry i dont think i can help
It is a method of work organization that seeks to increase productivity through the maximum division of functions, the specialization of work and the strict control of the time needed for each task.
Answer:
Create a validation rule using ISPICKVAL()
Explanation:
Solution
This can be achieved by creating a a validation rule using ISPICKVAL()
Create a Validation Rule Based on a Pick list
: The ISPICKVAL() are very important for creating validation rules that check whether a definite pick list value is chosen. for instance, say you want another person to enter a reason when they change a case's Status pick list value to increase.