Lexi is engaged in extended problem solving because she wants to find a gift that her sister would like and use.
This can be referred to as a situation where by a person that is buying from a store would look for a good that has the best quality. The good may be the most expensive.
This is what Lexi is doing as she tries to find the gift for her older sisters graduation.
Read more on Problem solving here: https://brainly.com/question/10708306
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