Question 1 (1 point) (This question is related to IL02- "be able to describe the working principles behind key protocols used in modern computer networks".) Suppose a message M consists of a sequence of bytes: 10010100 10001011 11010101 00010001 10101001 01000000 00100100 11101010 01110010 a) (0.4) Use 1s complement arithmetic to calculate the checksum of this message. Show the calculation. b) (0.2) Suppose the protocol composes the outgoing message M' by concatenating the checksum value (C) with the original message M, i.e., using python notation, M' C+M Show the resulting byte sequence M'. c) (0.4) Suppose there was a transmission error affecting the fifth and sixth bytes of M'; some of the bits were corrupted. The error changed 01111111 to 01110100 and 11010101 to 11011110. Show that this error is detected at the receiver's side