Needing advice:/

Nikkimaxim

Hello. My goal is to burn fat while still maintaining/possibly gaining more muscle. I would like to get my abs back and tighten my muscles up. I currently weigh 123 pounds, but 115 pounds would be my ideal weight. What rep range should I be lifting in? How much and how often should i do cardio? Should i eat below, above or at maintenance calories? What has worked for you all?