3-5 reps for strength
6-8 reps for some strength and some size (although you won't get the best from either)
9-15 reps for size
This goes for any exercise, although size is still a product of how...
Are you squatting and deadlifting to release all your growth hormones? Are you eating like a horse? Chinups are the best bicep workout so you're doing plenty of those right?
Never do cardio directly after a workout. They can be done on the same day but in separate sessions. Combining them hastens muscle catabolism. They also require conflicting sources of sugar to...
Situps are bad for your back, don't do them. And don't listen to any idiot here who says they are not bad for your back.
Besides that your workout sucks and you should do Starting Strength.