A bread$-$making factory has the production process shown in the figure below.There are five operations in sequence. The product only needs to go through one of the parallel machines in each case where parallel machines exist. What is the bottleneck operation of this process?ProofMix$60$ min.$/$batch$50$ min$/$batchBake$60$ min.$/$batchPack$40$ min.$/$batchProof$60$ min.$/$batchCut$35$ min.$/$batchMix$50$ min$/$batchBake$60$ min.$/$batchPack$40$ min.$/$batchProof$60$ min.$/$batcha$.$ What is the throughput time?I Select $]$b$.$ What is the bottleneck operation and time?$[$ Select$]$c$.$ What is the hourly capacity of the operation?$[$ Select $]$