plz help i dont understand what/how to do

Data envelopment analysis can measure the relative efficiency of a group of hospitals. The following data from a particular study involving seven teaching hospitals include three input measures and four output measures: a. Formulate a linear programming model so that data envelopment analysis can be used to evaluate the performance of hospital D. b. Solve the model. c. Is hospital Drelatively inefficient? What is the interpretation of the value of the objec- tive function? Hospital A B D E F G Full-Time Equivalent Nonphysicians 310.0 278.5 165.6 250.0 206.4 384.0 530.1 Input Measures Supply Expense (1000s) 134.60 114.30 131.30 316.00 151.20 217.00 770.80 Bed-Days Available (1000) 116.00 106.80 65.52 94.40 102.10 153.70 215.00 Hospital B D E F G Patient-Days (65 or older) (1000) 55.31 37.64 32.91 33.53 32.48 48.78 58.41 Output Measures Patient-Days (under 65) Nurses (1000s) Trained 49.52 291 55.63 156 25.77 141 41.99 160 55.30 157 81.92 285 119.70 111 Interns Trained 47 3 26 21 82 92 89 d. How many patient-days of each type are produced by the composite hospital? e. Which hospitals would you recommend hospital D consider emulating to improve the efficiency of its operation