Q$1\mathrm{.}1$: The mean time to failure $($MTTF$)$ of a single disk is $1,200,000$ hours. If a RAID $0$ array is using $5$ such disks, what is the MTTF $($with failure defined as the loss of any data$)$ of the entire array?

Q$2$: Through data collection, you observe over the past $100$ days, your web hosting provider has been up and running $99\%$ of the time. The average $($mean$)$ time for repair is $6$ hours.

Q$2\mathrm{.}1$: What is the availability of your hosting service for this period of time?

Q$2\mathrm{.}2$: What is the mean time to repair $($MTTR$)?($in days$)$

Q$2\mathrm{.}3$: What is the mean time to failure $($MTTF$)?($in days$)$