4. Apply DEA to the following data set in order to measure the efficiency score of the following nine firms: Firm Inputs (x1, x2) Outputs (v1,v2) A (15, 23) (20, 53) B (45, 10) (39, 23) C (60, 55) (27,45) D (10, 32) (43, 43) E (10, 19) (90, 75) F (27, 43) (34, 38) G (43, 24) (50, 33) (27,33) (22, 13) I (21, 34) (56, 21) 4. Continue There are two ways to use the DEA computation in terms of the condition (i.e., the sum of all weights is unity). (a) Estimate an efficiency degree of all firms. Compute with and without the condition. Any difference? (b) Formulate the DEA problem to evaluate the performance of Firm A. In this case, the condition (i.e., the sum of all weights is unity) needs to be incorporated in your formulation. H