c$)$ Consider a system in which $100\%$ of page$-$faults require a page to be swapped in from disk

and $50\%$ of page$-$faults require a victim page to be swapped out. If the page size is $4$KiB and

disk read and write speeds are both $300$ MiB per second, calculate the average page$-$fault

service time $($assume all overheads apart from swap time are negligible$).$ Give your answer to

two significant figures.