Which is a non$-$functional requirement?

e$)$ The system must provide logon seeurity at the operating system level and at the application level.

Eaeh input form must inelude date, time, produet eode, customer number, and quantity.

The system must be operational $7$ days a weck, $365$ days a year.

$)$ The website shall report online volume statisties every four hours and hourly during peak periods