its quality management course, can anyone help pls?

Question 1 Seven components in series are each distributed exponentially with a constant failure rate. 1- If R(35)=0.959; find the individual MTTF in minutes. 2- Find the probability that the system will fail during 600 minutes 3- Find the reliability of individual component during 1 hour Question Two Consider a 5 components system with failure distribution having CFR as shown below. Suppose that the reliability of subsystem- A is R(90)=0.9895. 1- Calculate the individual MTTF of the product C2 2- Calculate the probability that the system will not fail during 200 working hours Question Three A manufacturer performs an operational life test on ceramic capacitors ( C1 and C2 ) and finds they exhibit constant failure rate. The mean time to failures of these capacitors are found to be 2500 and 4300 hours, respectively. 1- What is the probability that the capacitor C1 will fail during 1001 hours? 2- What is the probability that the capacitor C2 will fail at 99 hours? 3- Calculate R(200hrs) Question Four Consider the reliability block diagram, the MTTF of subsystem-A is 8500 hours. Calculate the reliability of the system below using t=120 hours. Note that C3 is another type of capacitors produced by the same company Question 1 Seven components in series are each distributed exponentially with a constant failure rate. 1- If R(35)=0.959; find the individual MTTF in minutes. 2- Find the probability that the system will fail during 600 minutes 3- Find the reliability of individual component during 1 hour Question Two Consider a 5 components system with failure distribution having CFR as shown below. Suppose that the reliability of subsystem- A is R(90)=0.9895. 1- Calculate the individual MTTF of the product C2 2- Calculate the probability that the system will not fail during 200 working hours Question Three A manufacturer performs an operational life test on ceramic capacitors ( C1 and C2 ) and finds they exhibit constant failure rate. The mean time to failures of these capacitors are found to be 2500 and 4300 hours, respectively. 1- What is the probability that the capacitor C1 will fail during 1001 hours? 2- What is the probability that the capacitor C2 will fail at 99 hours? 3- Calculate R(200hrs) Question Four Consider the reliability block diagram, the MTTF of subsystem-A is 8500 hours. Calculate the reliability of the system below using t=120 hours. Note that C3 is another type of capacitors produced by the same company