Timesheets for compensation purposes

Hi team, im new to clarizen and currently use the approved hours as basis in finance to help with project cost recoveries. My questions are as below- 1. Please explain the workflow of reported, submitted and aplroved timesheets. Eg if a timesheet is submitted in january but not approved till February, does that mean that those hours on the timesheet submitted land in February? 2. How far back can timesheets be backdated to? 3. Can we restrict rhe ability to backdate timesheets? 4. Is there an audit log available from when a timesheet would have been reported, submitted and whether its been approved? 5. Whats the best reporting on timehseets that are submitted but still pending aplroval from prior mths? Thank you