Hey there! I'm happy to help!
Kigali is the capital of Rwanda, a small African nation surrounded by the DRC, Uganda, Tanzania, and Burundi.
The Prime Meridian has a longitude of 0°. Each time zone takes up 15° of longitude. Since 15×2=30, Kigali is going to be 2 time zones ahead of Greenwich. Why ahead?
Well, the Earth rotates counter clockwise, so if you look at the Earth from above, the parts in the East will rotate towards the Sun first, so they will experience sunrise and sunset before the other parts, so Kigali is ahead, not behind.
So, two hours ahead of 9:00 a.m. is going to be 11 a.m. in Kigali.
Have a wonderful day and keep on learning! :D