Maria is a receptionist in Citibank's corporate offices. She reports to work at $6$:$00$ am and opens up the office's main entrance, and sits at the main reception desk. She leaves the office at $1$:$00$ pm and Veronica replaces her and she stays at the office until $8$:$00$ pm and shuts off the lights and locks the front doors. This arrangement is called?

$1.$

Time & Motion Studies

$2.$

Job Enrichment

$3.$

Union Contract Rules

$4.$

Job Specifications

$5.$

Job Sharing