The correct usage of pronouns in the given sentence is to make use of:
What is a Pronoun?
This refers to the part of speech which is used to represent a noun which is used in naming things.
With this in mind and from the knowledge of pronouns, the correct way to construct the sentence is to say that Sarah bought the tickets for herself and I because this is the use of reflexive pronoun.
Read more about pronouns here:
https://brainly.com/question/11658309
