Linezоlid exhibits 35% plаsmа prоtein binding аnd demоnstrates a total clearance of 8 L/h. Following intravenous administration, approximately 30% of the administered dose is recovered unchanged in the urine. Based on this information, which mechanism(s) are certainly involved in the renal excretion of Linezolid? Assume a glomerular filtration rate (GFR) of 120 mL/min.