Is it okay to do Student Council only as a senior, or should I do it more years?

Pre-Med & Medical School High School Student Topics
1

Should I take student council more years than just senior year and have less AP classes? Or should I replace it with another AP class in senior year?

2

Normally student council is an elected position and often the same kids are elected all 4 years. Is it something you can count on doing just senior year? Is it a class at your school?