Consider a manufacturing process depicted by the following flowchart. A1 C1 A2 B C2 Station A has 3 parallel operators, A1, A2, and A3. Station C has 2 parallel operators, C1 and C2. Each unit only needs to be processed by one of the operators A1, A2 and A3. After being processed at Station B (with a single operator), a unit then needs to be processed by either C1 or C2. The process time of the individual operators are given as follows. A1, A2, and A3: 24 minutes B: 10 minutes C1 and C2: 4 minutes. The process initiates the production of a new unit every 16 minutes. What is the labor productivity (in units/hour) of this process