Which Power Fx formulas should you use?

HOTSPOT

Users in your company vote on color choices for marketing materials by using the following canvas app:

Users enter color names into a text control and then select Add color to add the color to the Color options radio control. You must remove all the listed colors when a user selects Clear Selection.

You need to implement the functionality.

Which Power Fx formulas should you use? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point.