Your office has been experiencing network overloads between $10$:$00$ and $10$:$30,$ which has resulted in customer complaints. You have traced the cause of the problem to five people who are watching a CEO videoconference on their computers. The peak load of the video feeds reaches $150Mbps.$ Your network currently uses a $24$ port $100$BaseT switch over Cat $5e$ cable. The CEO doesn't care how much it costs, and promises to buy the IT department lunch if this is fixed by the end of the week. Which of the following would be the cheapest $($and simplest$)$ way for a network administrator to deal with this peak load and still get free lunch?

Purchase and install a new video conferencing system that runs using coaxial cable.

Upgrade all of the building wiring to fiber.

Purchase and install a $1000$BaseT switch.

Reprogram all of the applications at the company so that customer applications have higher priority than the videoconferencing application.