c) Please draw the chemical structure of the repeating unit of PPA 6T. (3 P) d) In PPA 6T, T stands for terephthalic acid. What does the 6 stand for ? (1 P) e) Finally, which of the following designations for PPA are correct ? Highlight your answer with a tick [Caution: Wrong ticks are counted -1; minimum total points
=0
]. (3 P) PPA is a... copolymer correct wrong copolyester polyamide