$($Part$1)$ The password length shall be $8-12$ characters and $($Part $2)$ it should be changed once in a six months. The part $1$ of the requirement is $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$ and part $2$ is $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_.$

Group of answer choices

Both are Mandatory Requirements

Desirable Requirement, Mandatory Requirement

Mandatory Requirement, Desirable Requirement

Both are Desirable Requirements