2. Answer the questions and perform the arithmetic operations, shown below, in a 4-bit system. Show your work, and indicate if overflow occurs. Also, perform the operations in the decimal base. a) unsigned binary system: i. for n=4, what is the range of numbers that can be represented in an unsigned binary system? ii. 1110+ 0111 iii. 1110-0111 iv. 1100 + 1011 v. 1100-1011 b) two's-complement system: i. for n-4, what is the range of numbers that can be represented in a two's-complement system? ii. 1110+ 0111 iii. 1110-0111 iv. 1100 + 1011 V. 1100-1011