s. Calculate the 16 bit checksum for the following: (2 marks) 1001 1001 1001 0011 0110 1010 0011 1001 6. Byte stuff 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) 7. stuff he following frame payload Underline the modifications to the above payload (1 mark)