s. Calculate the 16 bit checksum for the following: (2 marks) 1001 1001 1001 0011 0 0000 0101 0110 1010 0011 1001 6 Byte ff the following frame payload (DEDDFDDEEDFD) where E is an Escape Character, F is the Flag Character and D is the data character other than an Escape and Flag Character. Bold and Underline the modifications made to the above frame payload (1 mark) . Bi stuff the following frame payload Underline the modifications to the above payload (1 mark)