Please help, i don't understand how they got this answer or how to solve this engineering economy question.

With reference to the data provided in the table, make any recommendations for choosing the preferred alternative by using (a) dominance, (b) satisficing, (c) disjunctive resolution, and (d) lexicography. Use all the methods separately. Click the icon to view the table for the data for the alternatives discussed. CH! a. Choose the correct answer below. O A. Alternative "Vendor Ill" is dominated only by alternative "Vendor l' and should be eliminated. B. Alternative "Vendor Il" is dominated only by alternative "Vendor Ill" and should be eliminated. OC. Alternative "Vendor l' is dominated by alternatives "Vendor Il" and "Vendor lil' and should be eliminated. OD. Alternative "Vendor Ill" is dominated only by alternative "Vendor Il" and should be eliminated. b. Choose the correct answer below. More info A. Only alternative "Retain Existing System" should be eliminated. B. None of the alternatives should be eliminated. . OC. Alternatives "Vendor l' and "Retain Existing System" should be eliminated. OD. Alternatives "Vendor Il" and "Retain Existing System" should be eliminated. Alternative Attribute Worst Acceptable Value Vendor/ Vendor / Retain Existing System Vendor II c. Choose the correct answer below. 84% 50% Poor Excellent Good Excellent Good Good Good Fair O A. Only alternative "Vendor l' should be eliminated. XB. Only alternative "Vendor Il" should not be eliminated. OC. Only alternative "Vendor Il" should be eliminated. *. None of the alternatives should be eliminated. A. Reduction in 75% throughput time 70% B. Flexibility Good Excellent C. Reliability Excellent Good D. Quality Good Excellent E. Cost of system (PW $270,000 $310,000 of life-cycle cost) Pairwise comparisons: 1.AD 2.A-C 7.BE 3.AC 10.DE $280,000 $0 $0 $350,000 d. Choose the correct answer below. O A. Alternative "Vendor l' should be chosen. B. Only alternative "Retain Existing System" should not be chosen. O C. None of the alternatives should be chosen. D. Alternative "Retain Existing System" should be chosen. With reference to the data provided in the table, make any recommendations for choosing the preferred alternative by using (a) dominance, (b) satisficing, (c) disjunctive resolution, and (d) lexicography. Use all the methods separately. Click the icon to view the table for the data for the alternatives discussed. CH! a. Choose the correct answer below. O A. Alternative "Vendor Ill" is dominated only by alternative "Vendor l' and should be eliminated. B. Alternative "Vendor Il" is dominated only by alternative "Vendor Ill" and should be eliminated. OC. Alternative "Vendor l' is dominated by alternatives "Vendor Il" and "Vendor lil' and should be eliminated. OD. Alternative "Vendor Ill" is dominated only by alternative "Vendor Il" and should be eliminated. b. Choose the correct answer below. More info A. Only alternative "Retain Existing System" should be eliminated. B. None of the alternatives should be eliminated. . OC. Alternatives "Vendor l' and "Retain Existing System" should be eliminated. OD. Alternatives "Vendor Il" and "Retain Existing System" should be eliminated. Alternative Attribute Worst Acceptable Value Vendor/ Vendor / Retain Existing System Vendor II c. Choose the correct answer below. 84% 50% Poor Excellent Good Excellent Good Good Good Fair O A. Only alternative "Vendor l' should be eliminated. XB. Only alternative "Vendor Il" should not be eliminated. OC. Only alternative "Vendor Il" should be eliminated. *. None of the alternatives should be eliminated. A. Reduction in 75% throughput time 70% B. Flexibility Good Excellent C. Reliability Excellent Good D. Quality Good Excellent E. Cost of system (PW $270,000 $310,000 of life-cycle cost) Pairwise comparisons: 1.AD 2.A-C 7.BE 3.AC 10.DE $280,000 $0 $0 $350,000 d. Choose the correct answer below. O A. Alternative "Vendor l' should be chosen. B. Only alternative "Retain Existing System" should not be chosen. O C. None of the alternatives should be chosen. D. Alternative "Retain Existing System" should be chosen