Question:

I know how to say it's 4 o'clock, and even that it's 4:30. However, I'm unsure how to say whether it's a.m. or p.m. and I don't know how to say it's 4:05 or 4:15. Also, I'm having trouble figuring out how to say "I'll be there in 5 minutes" or something basic like that with time. Any help appreciated!