9.11 A multihospital system would like to compare the productivity of nursing staff in three of its cardiac intensive care units.Table EX 9.11 Measurement Unit 1 Unit 2 Unit 3 Annual Hours 185,200 200,735 196,500 Annual Patient Days 12,450 14,000 13,275 Average Length of Stay 4.1 3.8 4.3 (days) Patient Classification Direct Care Distribution of Hours Patients Level 1 3 0.35 0.15 0.55 Level 2 5.5 0.45 0.55 0.20 Level 3 9 0.20 0.30 0.25Skill Mix Distribution RNs ($38/hour) 0.45 0.40 0.35 LPNs ($23/hour) 0.15 0.35 0.30 NAs ($15/hour) 0.40 0.25 0.35 Assume that 1 LPN = 0.78 RN and 1 NA = 0.55 RN. Using the data for each unit shown in Table EX 9.11, compute the following for each unit: a. Case mix index b. Adjusted nursing hours per adjusted discharge c. Nursing salary expense per adjusted discharge d. Percentage of adjusted nursing hours in direct patient care e. Which cardiac unit would you recommend be used as the benchmark for future improvement initiatives? Justify your