This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to cast from a chrome browser
Locate an empty hdmi port on your tv.
Look behind your tv and find the hdmi ports at the back. Your tv may have multiple hdmi ports, just select one.

Choose your answer from:
(1). Select " widget " or " more " to close the port on your tv. If your tv has multiple hdmi ports open, this can make your tv easier to cast.
(2). If so, you'll need a hdmi port to cast. Press the white " select + + " symbol on the center screen.
(3). Connect the chromecast dongle to a power source. Plug one end of the usb power cable into your chromecast and the other end of the cable into the power supply and then into a nearby power outlet.
(4). If you can't find the hdmi ports on your tv, the following are the default ports to cast from. Insert the isd card or usb cable through the port.
The answer is:
(3).