Help me please both questions please ❤️

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

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

What is the greater volume 72 quarts or 23 gallons