Answer:
YG, YT, YU, BG, BT, BU, WG, WT and WU
Explanation:
The sample space are all the posibles options that you can take, so the sample space in these case is:
YG, YT, YU, BG, BT, BU, WG, WT and WU
Where, for example, YG means that you choose Yellow for your game room and Green for your entertainment center and BU means that you chosse Yellow for your game room and Unfinished for your entertainment center.