Please see the work below.
Work Step by Step
a. first, as the PH of the solution is less than 7 at the start of the titration, we can conclude that an acid is being titrated with a base. b. The Ph of the equivalent point is about 8.5. Hence, the acid is being titrated is a weak acid. c. We need to pick an indicator which changes color in the PH from 7 to 10.