In computer architecture

QUESTION 4 [10 MARKS] a) For presenting the negative numbers in a binary fashion, three methods can be used. Explain how the negative numbers in a binary fashion are presented using the Sign bit. (4 marks) b) The instruction during its processing as it perform the fetch which involved reading the next instructions from memory into the processor and hence executing as interpret the opcode and perform the indicated operation, in this processing cycle it passes through several stages that shapes the overall structure of the instruction cycle, with this background answer the followings: i) Briefly explain how they will be carried out. (8 marks)