Quality control costs can be categorised into internal and external failure costs, inspection costs and prevention costs. Into which of these four classifications would the following costs be included?

$($i$)$ The costs of a customer service team.

$($ii$)$ The costs of quality control equipment maintenance.

Customer service team Quality control equipment maintenance

Internal failure costs Inspection costs

Customer service team Quality control equipment maintenance

Internal failure costs Prevention costs

Customer service team Quality control equipment maintenance

External failure costs Inspection costs

Customer service team Quality control equipment maintenance

Exernal failure costs Prevention costs