Here, t is less than 11, neither greater than it nor equal to 11.
So,
I) t = 12 cannot be possible since 12 > 11.
II) t = 9 is possible 9 < 11.
lll) t = 11 cannot be possible since it is equal to 11.
Answer:
1) No
2) Yes
3) No
Hope it helps.
If you have any query, feel free to ask.