The resources $($workers$)$ and processing times $($mins per unit$)$ for $3$ activities in a production system are shown below.Activity $1$Resources:Processing time:$2$ worker A$12$ min$/$unitActivity $21$ worker B$5$ min$/$unitActivity $3\_4$ worker C$15$ min$/$unita$)$ What is the capacity $($throughput$)$ of each activity and the complete production system? Comment on how Activity A impacts on the entire system.b$)$ What is the average WIP level when the system is at full capacity $($apply Littles