Nina has breakfast at half past seven (half- половина) или at seven o'clock 30 (thirty) minutes.
Nina goes to school at eight o'clock
What time does she go to sleep?
Nina goes to sleep at half past nine или at nine o'clock 30 minutes.
Надеюсь правильно

2.She has breakfast at half past eight
3.she goes to school at eight o clock
4.She goes to bed at half past ten