Oxygen is produced by liquefying air and distilling it at low temperatures. Liquefied air (21mol%02, 79%N2) is sent to a distillation column where it is separated as stream 1 (96mol%N2, 4% 02) leaving at the top and stream 2 (60 mol%N2, 40%O2) leaving as bottom and. Both streams are then fed to another column. Nitrogen -rich product (98 mol%N2, 2% O2) is withdrawn as distillate and oxygen -rich product (99.5% 0z, 0.5% N2) is withdrawn as the bottom product. 1. Do the degree of freedom analysis for unit 1, unit 2 and the overall process and then calculate the following: 2. The percent recovery of oxygen in the oxygen -rich product. 3. The flow rate of stream 2 in mol/s for the production of oxygen -rich product at a rate of 3.2 kg/s. Product nitrogen 98%N, 2 %02 Stream 1 Air (liquid) Unit 1 96%N2 4 %02 79%N2 21 % Unit Il Stream 2 Product oxygen 60%N, 40 %02 0.5%N2 99.5 %O2