2. In each of the three scenarios below, the problem is poorly defined. Propose an improved definition of the problem. You should explain why your revised statement is more appropriate. Scenario A: In a large chemical process, energy to run the units comes from steam. (Steam is preferable to electricity because it is less likely to spark an explosion.) Your plant has several steamgenerating units in a location at the periphery. Most of the units burn natural gas (methane) but one burns a high-sulfur oil. Whereas there are negligible emissions of SOx from the methane-burning units, the emissions of SOx from the stack of the oil-burning unit are too high. Problem: Install a scrubber to remove the SOx from the offending stack. Real Problem:? Scenario B: Chemical plants are constructed on large slabs of concrete that typically cover dozens of acres. During normal operation oil and other liquids leak onto the concrete and accumulate in various ditched. When it rains, the water washes the oil off the concrete. The runoff from the plan is therefore polluted and cannot be released to a river or lake. Problem: Construct a holding tank to catch the water so it can later be treated then released. Hint: What volume of holding tank is needed to collect rain at the rate of 1 inch per hour, falling for 8 hours on a plant that covers 100 acres? Real Problem: ? Scenario C: Some therapeutic proteins are synthesized in E. coli cells suspended in large bioreactors. The protein is produced inside the cell, and various steps to lyse (rupture) the cell and extract pure protein are performed. One such step is a filtration that removes cell debris. However, for various reasons, the filter sometimes fouls earlier than expected, resulting in an unplanned plant shutdown (such shutdowns, like all shutdowns, are extremely expensive in lost production). Problem: Prevent the filter from fouling. Real