Im tired...but happy though

Yesterday been gone through a war against engineering ethics..Write till my hands feels like going to broken and no more energy to write! Eventhough very hard and tired when writing the answer, but it still better than dun even know how to write right? Just like the Instrumentation and Control (I n C) test last time, eventhough it is an open book test for the last half an hour, there is no answer you can find in the text book. Furthermore, I didn't bring my textbook..The problem is we don't even understand the course, and don't even say how to answer the question, we are totally blank on this. Thus, now engineering ethics eventhough need me to study, memorize and write a lot, but I'm happy while doing this!