In a certain model, the analyst would like to record the time a patient leaves his/her exam room by writing the time to the exam room's (ExamRoom1) label titled, "PatDepartTime." According to the User's manual, the analyst should use a statement, to wit, setlabelnum(object, "PatDepartTime," time());. Then, when the cleaning crew arrives, the analyst would like to subtract the current model time from the PatDepartTime for that location, and then record that value in a global variable (CleaningDelay) for eventual display and analysis. In short, the analyst would like to keep a running record of the time it takes cleaning crews to arrive. What are the correct statements need to execute this requirement?