I cant really help you on the models but I can on the other question. If it is above it is a positive number if it is below it is a negative number. So whatever number you think it is below just write a negative sign with the number. Hope this helps
He believed that Germany was trying to develop one
You can't write a TV show in 10 sentences.
This is an intriguing premise, though. Looking forward to everyone's answers, and I might write one myself.