Final answer:
The correct option is 1) your last name / page number / right.
The header of your paper should include your last name and page number, aligned to the right. Other details like your name, instructor's name, course title, and date appear at the top of the first page, aligned left.
Step-by-step explanation:
The header of your paper should include your last name and the page number, aligned to the right. This is standard format for many style guides, including the Modern Language Association (MLA) handbook. For example, if your last name is Smith and you are on the third page, your header would appear as 'Smith 3' in the top right corner of the page.
Below the header, the first page typically includes your name, your instructor's name, the course title, and the date, aligned to the left. Remember to use one-inch margins on all sides, double-space throughout the paper, and indent paragraphs one-half inch. Finally, always proofread your paper for both formatting consistency and to correct any typographical errors.