A client is prescribed ceftriaxone (Ceftin) prophylactically…

A client is prescribed ceftriaxone (Ceftin) prophylactically for an upcoming coronary artery bypass graft (CABG) surgery.  The medication prescription is  a one time dose of 1 gm IV.  The medication is mixed in 50 mL of 0.9% normal saline and is to be administered over 15 minutes as an IV piggyback.  What rate should the infusion pump be set at?