Two flight guidance systems are being evaluated for a backup control tower at a local airport. One system utilizes conventional radar, and the second uses a global positioning system (GPS). The life of both systems is 6 years, and the MARR is 12% per year. Based on the internal rate of return criterion, which guidance system would you recommend?Two flight guidance systems are being evaluated for a backup control tower at a local airport. One system utilizes conventional radar, and the second uses a global positioning system (GPS). The life of both systems is 6 years, and the MARR is 12% per year. Based on the internal rate of return criterion, which guidance system would you recommend?