twos compliment

Assume that we are using a 16-bit system. Represent a negative integer with two's complement format. 1. (2 pts) Convert the decimal numbers -102 and -87 into hexadecimal number. 2. (1 pt) Add two numbers of the previous question as hexadecimal, and state 1. whether the sign bit of the result is 1, and 2. whether an overflow occurred