A handrail added into a photo of some stairs.

A photo of our stairs needs to have a handrail photoshopped into it. The photo needing editting is named ‘Stairs’ in the attached materials. I've also attached a photo named 'Stairs with position' that shows roughly where the handrail needs to be and I've attached another photo called 'handrail eg' of the type of handrail we need added in. The handrail doesn't need to look exactly like the example given but the edited photo must look realistic.