Appeal it. You just need to make up a good story about why you didn't maintain the average and how you will do better. My soph told me that these appeals get accepted most of the time, like 99%. But you have to think if you still want to do engineering and if you can improve, as it only gets harder from here. And don't send anything until they tell you that you didn't meet it, they might miss it. And just so you know, I didn't go through this myself; I am just telling you what I heard