The Hampton County emergency medical service (EMS) covers an area of 500 square miles with a population of over 100,000. In addition to ambulances and fire engines, the EMS is considering purchased three quick response vehicles—SUVs equipped with medical equipment—to respond to priority-one patients that appear to be experiencing life-threatening emergencies in a timely manner. The national standard performance measure for responses to priority-one dispatches is 9 minutes, which the Hampton County EMS hopes to achieve. The EMS receives an average of 10 emergency calls (Poisson distributed) on an average weekday between 8 a.m. and 8 p.m., and each call requires an hour (exponentially distributed). Will the three new SUVs enable the EMS to meet the national standard? If the EMS only purchased two SUVs would that meet the national standard?