Kindly answer the following:

1) What is a quick way to determine negative numbers in 1's complement form?

2) How do you identify an overflow condition when adding two numbers in 1's complement form?

3) If you see the 2's complement number 1111110 (base 2), what can you quickly say about it?

4) in 2's complement form, you add two positive numbers and the resulting number begins with a 1, what happened?