return orderlies

[Abu Sayeed Mozomder]

Assume that the transportation

time back from the X-ray lab is exactly the same as the transportation time to the X-ray lab. If no patient is ready to go back, the orderly will wait for 5 minutes; if no patient becomes available during this time, the orderly will return to the ward without a patient. The time for an orderly to walk back without a patient is always 5 minutes. The orderlies will never go and pick up a patient at the X-ray area without bringing another patient with them from the ward.
how can i fix it here;