1 - [2 pts] Briefly describe overflow. When does it occur? 2 - [2 pts] Briefly describe underflow. When does it occur? 3 - What decimal number does the bit pattern 11000101 represent if it is a: [1 pts] unsigned integer? [1 pts] sign-magnitude integer? [1 pts] two's complement integer? 4 - What decimal number does the bit pattern 01011100 represent if it is a: [1 pts] unsigned integer? [1 pts] sign-magnitude integer? [1 pts] two's complement integer?