1 3/4 divided by 2 5/8

Aparallel system functions whenever at least one of its components works. consider a parallel system of n components, and suppose each component works independently with probability 0.5. find the conditional probability that component n works given that the system is working

Pls , the question is in the picture!

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6