convert +38 and -24 to 3 digit 10's complement form anf add them

2. consider NUM= (x3x2x1xo)16 , an arbitrary 4 digit number in base 16 . how many bits di we need to represent a single digit of NUM in base 2

3. which representation require a simole hardward design ? sign and magnitude or 2's complement

4. what is the range of values we can represent 10 bits if we use 1's complement representation ? what is the range of values we can represent with 10 bits if we use 2's complement representation?