QUESTION $4$

Four steps are needed to create and deliver a service. After collecting information on errors per step, the reliabilities for each step are the following. Step $1$ is $0\mathrm{.}94.$ Step $2$ is $0\mathrm{.}98.$ Step $3$ is $0\mathrm{.}95.$ Step $4$ is $0\mathrm{.}96.$ With this information, the reliability of the total service system can be calculated as

a$.0\mathrm{.}86$

b$.0\mathrm{.}80$

c$.0\mathrm{.}82$

d$.0\mathrm{.}84$

QUESTION $5$