Exam Answer Key PDF Formatting

I have an exam answer key in PDF form that needs a professional overhaul. What I mainly require is clear question numbering and neatly organized answer sections throughout the document, so instructors and students can refer to it without confusion... (Budget: ₹600 - ₹1500 INR, Jobs: Adobe Acrobat, Adobe InDesign, Graphic Design, PDF, Print Design, Proofreading, Typography, Word)