Question $1$: Answer Problem $17\mathrm{.}5($a$,$ b$,$ & c$)$ at the end chapter $17.$ Show all the steps in your responses to each of the four questions. As always, clearly each response $($e$.$g$.,17\mathrm{.}5($a$)$; $17\mathrm{.}5($b$)$; $17\mathrm{.}5($c$)$ and show all steps taken to arrive at the answers.

Question $2$: Consider Solved Problem $17\mathrm{.}2$ given in the textbook. If the reliability of each and every component shown in R$1,$ R$2,$ R$3,$ R$4$ and R$5$ are reduced by $15\%($for example, R$2$ becomes $0\mathrm{.}8),$ calculate the total reliability of the system. As done in the solved example, be sure to show all steps. NOTE: You should not redraw the diagram.