Answer:
The structures are shown in figure.
Explanation:
At low pH (pH < 1.88) aspartic acid is completely protonated.
Both amine and carboxylic groups are protonated.
At medium pH (3.65-9.68) amine group is protonated and both the carboxylic groups are deprotonated.
At high pH (above 9.68) all the groups are deprotonated.
