1) A system is composed of a single module with a poor reliability value of only 0.75. To improve the system's reliability through redundancy, an identical module is added in parallel. What will the system's reliability be? What if another level of redundancy is added? 2) A system consists of four units connected in series. The unit reliabilities are: R = 0.90, R2 = 0.97, Rs =0.8 and R4 =0.85. It is desired to increase the total system reliability by adding some parallel units. Space and cost considerations only allow adding either two identical parallel units to the existing unit Rs, or one identical unit to the existing unit R4. Determine which option will be more effective. 3) Several families of components, Fi, are to be produced on four types of machines, L. M, D, and G. Four machines of each type are available, and two systems of physical arrangements have been proposed functional layout, designated as System I, and group technology layout, designated as System II. Draw a block diagram for each system and determine the system reliability. Ru - Rox=0.8 and R = R=0.7.1=1 to 4