$2)$ Assume we have a fingerprint biometric system for a company with $100$ employees. During enrollment, the system could not enroll $3$ employees, i$.$e$.$ only $97$ employees were enrolled. During testing, $10$ users were rejected when the system matched their fingerprint against their enrollment fingerprint template, while $2$ of the unenrolled employees were accepted.

Answer the following questions: $[1\mathrm{.}5]$

$1.$ The Failure to Enroll Rate $($FER$)$ is defined as the percentage of employees the system could not enroll. What is the FER?

$2.$ What is the False Reject Rate $($FRR$)?$

$3.$ What is the False Accept Rate $($FAR$)?$