Answer :
Final answer:
Devin's mistakes were that he did not capitalize the proper nouns Grandpa, Jeep Wrangler, Zion National Park, Cherry Coke, and July in his writing. These are specific names and should be capitalized as per the rules of English grammar.
Explanation:
Devin's mistakes involve not capitalizing the proper nouns in his writing. The corrected proper nouns are:
- Grandpa
- Jeep Wrangler
- Zion National Park
- Cherry Coke
- July
Proper nouns include names of specific places, people, brands, and times of the year that are unique identifiers and thus should be capitalized to follow the rules of English grammar. Devin forgot to use capital letters for these specific terms in his narrative about his summer trip.