please solve all asap

Question 1 (a): What is serial communication? Elaborate your answer with an example. (2.5 marks) Question 1(b): Which one is more efficient method of transferring serial data between synchronous serial communication and asynchronous serial communication? Explain your answer. (2.5 marks) Question 2 (a): In asynchronous communication, if a frame has a Start bit, 8 Data bits, a Parity bit, and a Stop bit. Calculate the overhead for 500 data bits. (2.5 marks) Question 2 (b): What is RS-232? Explain its suitability for Serial Communication. (2.5 marks) Question 3 (a): Consider the following figure of a portion of Frame for Serial port interfacing frame and explain: (1) Frame; (2) Transfer; (3) Transaction. (2.5 marks) Start of Frame Transfer n Transfer n+1 Packet Packet Packet Question 3 (b): List Transaction types used in USB for serial port interfacing and describe them in sufficient details. (2.5 marks) Question 4 (a): What is an Alternating Bit Protocol (ABP) in USB? Explain your answer with an example. (2.5 marks) Question 4 (b): Why is a Cyclic Redundancy Check field is affixed to the end of packets? Explain your answer using an example. (2.5 marks)