Traveling at half of speed of light /2

If two objects are moving towards each other, in straight line, at speed of 100MK/h each one, the reference speed from each object towards each other is the combine speed. On this case, 200KM/h.

From Einstein, no object can go faster than speed of light.

What happens when two objects are moving towards each other at half of speed of light (c/2) plus any delta (Δ)? The relative speed for each object will be higher than the speed of light.

If a third actor (C) is, let's say, at a distance of 1 second of c from both objects, and there is a light source inside each object moving at c/2+Δ, the light will:

1. travel from A (or B) to C in 1 second
2. from A to B (or B to A) in 1 second

but, 

1. how C will see the light moving from A to B (or B to A) ?
2. how an actor in A (or B) will see the relative speed of moving to each other?