What is systems safety and why is it important to the development of a system?

Answer these foundational questions on systems safety.1) What is systems safety and why is it important to the development of a system?2) Why is it important to continually review and refine the system throughout its lifecycle?3) How does that change if the system is used beyond its designed lifecycle, as is the case with USAF aircraft such as the B-52 and the KC-135?4) How is MIL-STD-882 used in systems safety?***PLEASE USE APA FORMAT AND STYLE******PLEASE PROVIDE AT LEAST 3 SCHOLARLY OR PEER-REVIEWED REFERENCES******PLEASE USE THE ATTACHED APA FORMAT EXAMPLE PAPER AS A REFERENCE******READING MATERIALS ATTACHED AS BEFORE***