$1.$ A data set is required for off$-$line scenario testing of a proposed new multimodal biometric entry system comprising of fingerprints and signature modalities, which is to be implemented in an old people$$s home. Describe the best practice considerations for collecting data set. Your answer should comment on factors such as data set size, collection environment, crew and sample capture.

$2.$ Explain the utility of liveness in a biometric system.

$3.$ A particular biometric system generates a score $[$S$](0<=$S $<=14)$ which measures the similarity between a test sample and a corresponding reference model for claimed identity. An identification decision is then made according to whether S$>\backslash$theta or S $<\backslash$theta $,$where $\backslash$theta is a variable threshold value $(1<=\backslash$theta $<=14).$ The FRR $(\%)$ and FAR $(\%)$ for thissystem for a range of values of $\backslash$theta is determined experimentally, with the results shown in Table $1$