1. Briefly compare the three levels of diagrams for chemical processes (5 pts) B) PED c) P&ID: 2. Label the following process flow diagram (PFD)-15 pts Label all the streams and equipment in the PFD. The air feed stream is fed to a compressor before entering exchanger. All pumps have a single back-up, and this is in 400 of the plant area. Докада Methanol Air D Water Off-gas Delonized water Production of Formalin from Methanol D Formalin