Lalita, Rui and Sujjan. salespersons for LRS Engineering Company, have provided you with a proposal for improving the temperature control on your current machine. The machine uses a hot-air knife to remove excess solder from printed circuit boards cleanly; this is a great concept, but the hot-air temperature control lacks reliability. According to Xuan, an engineer at LRS Engineering Company has improved the reliability of the critical temperature, but the new machine has a backup for each. The ve integrated circuits are connected in series and have reliabilities of 0.90, 0.95, 0.91, 0.9?, and 0.96. The five backup circuits all have a reliability of 0.90. (a) What is the reliability of the new temperature controller? (10 Marks) (b) If you pay a premium package, Lalita, Rui and Sujjan said they could improve all five backup units from 0.90 to 0.9T. What is the reliability of this option? (10 Marks}