Jessicа Thоmpsоn is а 28-yeаr-оld G1P0 at 34 weeks gestation, admitted to the labor and delivery unit with a diagnosis of preeclampsia with severe features. Her admission vital signs are: BP 168/112 mm Hg, HR 92 bpm, RR 20, Temperature 98.6°F, SpO2 98% on room air. She weighs 82 kg. Lab results show: platelets 118,000/μL, AST 68 U/L, ALT 72 U/L, creatinine 0.9 mg/dL, and protein/creatinine ratio 0.6. She reports a persistent frontal headache and sees "floaters" in her vision. The provider orders medications to manage her condition and prevent complications. The provider orders magnesium sulfate for seizure prophylaxis with the following instructions: Magnesium sulfate 4 g IV loading dose over 20 minutes, then 2 g/hour continuous infusion for maintenance. Available: Magnesium sulfate 40 g in 1000 mL Lactated Ringer's solution (premixed bag). A. At what rate (mL/hr) should you set the IV pump to deliver the 4 g loading dose over 20 minutes? B. After the loading dose, at what rate (mL/hr) should the nurse set the IV pump for the maintenance infusion of 2 g/hour?