The following diagram shows the flammable regions of hydrogen. Hydrogen is quite common in industrial chemistry and if green hydrogen is produced (without generating carbon dioxide), it has been proposed to be a good replacement for gasoline and other fuels. However, storage of this small molecule is quite complex. Not only can it easily leak, but it is also highly flammable. Someone proposes the following protocol to empty a hydrogen tank of 2L initially pressurized to 3 bar. Evaluate if this protocol is adequate to then fill the tank with air and continue with the maintenance. Be sure to show your calculations and FIX (if any) the problem step(s). Step 1. Empty tank by allowing pressure to be 1 bar. Step 2. Vacuum tank until pressure reaches 0.2 bar. Step 3. Fill tank with nitrogen until pressure reaches 1.5 bar. Step 4. Empty tank by allowing pressure to be 1 bar. Step 5. Vacuum tank until pressure reaches 0.2 bar. Step 6. Fill tank with nitrogen until pressure reaches 1.5 bar. Step 7. Empty tank by allowing pressure to be 1 bar. Step 8. Vacuum tank until pressure reaches 0.2 bar. Step 9. Fill the tank with air until pressure reaches 1.5 bar