A local university is deciding between three different copy machines. The copy machines have a mean time between failure and mean time to repair as shown in the table. 
What system(s) will provide the greatest availability?
Definitions:
Isometric
Pertaining to exercises or contractions where muscle length remains the same while muscle tension increases, often used in fitness and physical therapy.
Cardiovascular Health
Pertains to the overall condition of the heart and blood vessels, underlining the importance of preventing heart diseases and maintaining function.
Aerobic
Pertaining to or involving oxygen; aerobic exercise refers to activities that increase oxygen circulation to improve endurance and cardiovascular health.
Anaerobic
Relating to, involving, or requiring an absence of free oxygen, often referring to exercise that causes muscles to produce energy without relying on oxygen.
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