Show your work: Please click the "Show Work" button and type your step-by-step work, including the equations, plugging the data, calculations, results and conclusions. If no work is shown, you will receive zero credit for this question. R = 0.85 R = 0.96 R =0.76 R3 = 0.68 Clara designed the system above with her engineering team. (a) The overall system reliability is 69.46 % (enter your response as a percentage rounded to two decimal places). (b) If they have to pay $3,200 to fix a failed system, what is the expected failure cost of the system? $ 977 (round your response to the nearest dollar). (c) If Clara wants to add a(n) 95%-reliable backup to R4, how much should they pay for the backup at the maximum? $ 667 (round your response to the nearest dollar).