I know this is going to be such a noob question but...

Can anyone explain how to remove a rear caliper? My handbrake isn't engaging properly on the nearside. There is a new cable fitted but it's still below MOT standard. I have notice there is a hook on the caliper that the cable hooks onto that moves on the o/s by about 90degrees as the handbrake engages and disengages. The nearside one doesn't seem to move. It feels stiff compared to the n/s so am thinking it's an issue with the caliper itself. So, how is the caliper removed completely so I can change it? Step by step would be ideal