Hi. This question asks you to review a narrative you wrote, for that reason I can't answer it for you, but I'll show you how to answer it.
First you must write your story, not caring about the correct spelling of the words, but writing them the way you think is correct.
You should highlight the words you are in doubt if you spell them correctly and rewrite them on another sheet. In this sheet you will show not only the words that you had doubts about the correct spelling, but what is your doubt. Next, you must show the correct form that these words should be spelled.
Your question states that you must present the words that must have the first capital letter. Words that must have the first capital letter are those that present a person's name, the name of a place, or are written after a period.
For words that you don't know the correct spelling, you should look up that word in a dictionary, or a search engine like g00gle, to see the correct spelling.