Which of the following sentences has errors in spelling, capitalization, or punctuation?
ernie, tom, and melissa have created web pages as their final project.
the statue of liberty is on our school seal.
elmer’s tie was askew, and his shoes needed to be polished.
“rip van winkle,” by washington irving, is a very imaginative story.

Number two should not have a capital O on of

The second sentence has a capitalization error. in a title of a monument (and titles in general), you capitalize everything besides the articles and prepositions. "of" is a preposition, so it is incorrectly capitalized. it should be written as The Statue of Liberty; while "the" is an article, it's the first letter of the sentence and requires capitalization by that rule.

the third sentence possesses an unnecessary comma. if it were a series of three or more (i.e. elmer's tie was askew, his shoes needed to be tied, and his hair was a mess) then you would require a comma before "and"; however, in this case, and is only linking two things--his tie was askew and his shoes were untied. a series of two doesn't need a comma.

the fourth sentence also has unnecessary commas. ""Rip Van Winkle" by Washington Irving is a very imaginative story." on its own is grammatically correct. when listing a book and an author, it's not necessary to separate them by a comma.