answer part B only

Dfinity promises its customers that network services are 95% reliability. The network consists of three serial nodes, each of which must work for the network to be operational. Consistent with its customer guarantee the reliability of each node is 95%; however, the company has been receiving complaints about its service (a) Your ariswer is correct Calculate the reliability of the network. (Round answer to 3 decimal places, es 2.750) Reliability of the network 0.852 Are customer complaints justified? Yes (b) Dfinity is considering adding nodes to its network structure so that each of the current nodes is "backed up by a lesser node with a reliability of 75% What is the reliability of this revised network? (Round answer to 3 decimal places, e3. 2.750. Do not round intermediate calculations.) Reliability of the revised network