hello, struggling with Operating System questions if you could help please, much help would be greatly appreciated:

Calculate server reliability over the given time period and MTBF values:

hint:

Reliability = e ^{- (1/MTBF)(t)}

Time Period: 30 seconds MTBF: 180 days

Time Period: 40 days MTBF: 6 weeks

Time Period: 25 hours MTBF: 1 day