Please answer the question properly, I already posted this question before but someone just copied the answer of a different variation of this question. Thank you. All three parts is one question.

5.1 Illustrate a titration curve for the tri-peptide A-H-D. Designate all buffering regions. Be sure to properly label axes. (4 marks) 5.2 Fill in the table for the charge of the peptide above, to the nearest integer. You do not need a calculator. (1 mark) pH 1 3 7 10 Charge on peptide 5.3 Calculate the pl of the peptide A-H-D. (1 mark)