Given the task definition and input, reply with output. In this task, you're given a four sentences of story written in natural language. Your job is to complete end part of the story by predicting appropriate last sentence which is coherent with the given sentences.

Sentence1: Tara's computer was really sluggish lately. Sentence2: It was simply too old to handle all her applications. Sentence3: Tara decided to upgrade her computer. Sentence4: She purchased a new CPU and more RAM for her computer.
After installing the parts, her computer much smoother.