Consider the system of components connected as in the accompanying picture. Components 1 and 2 are connected in parallel, so that subsystem works if and only if either 1 or 2 works; since 3 and 4 are...

Please help with part a, b (first screenshot) and part c (second screenshot)!

Extracted text: Consider the system of components connected as in the accompanying picture. Components 1 and 2 are connected in parallel, so that subsystem works if and only if either 1 or 2 works; since 3 and 4 are connected in series, that subsystem works if and only if both 3 and 4 work. If components work independently of one another and P(component i works) = 0.7 for i = 1, 2 and = 0.66 for i = 3, 4, calculate P(system works). (Round your answer to four decimal places.) 2 3 4


Extracted text: Suppose that the proportions of blood phenotypes in a particular population are as follows: A B АВ 0.46 0.15 0.02 0.37 Assuming that the phenotypes of two randomly selected individuals are independent of one another, what is the probability that both phenotypes are O? (Enter your answer to four decimal places.) What is the probability that the phenotypes of two randomly selected individuals match? (Enter your answer to four decimal places.)