Identify the processes occurring in $(I)$,$(II)$,and $(III)$ based on the provided diagram.

(N/A) Based on the transport mechanisms across the membrane:
$(I)$ Uniport: $A$ single molecule moves across the membrane independently of other molecules.
$(II)$ Antiport: Two molecules move in opposite directions across the membrane.
$(III)$ Symport: Two molecules move in the same direction across the membrane simultaneously.