Помогите упр 5 сроооочно в часах вообще не разбираюсь

1.It is half past two
2.It is a quarter to eight
3.It is five minutes past eight
4.It is nineteen minutes past nine
5.It is six to six
6.It is half past eleven
7.It is a quarter to six
8.It is twenty minutes to eight
9.It is twelve to five
10.It is half past four

4.