"Screening" of light emitted by three point light sources

Investigate the light emitted by three LED lamps by screening it with single and triple slit systems. Answer the question.

Combining light from multiple light sources

The lights emitted from several light sources merge and do not "interfere" with each other. If, for example, two identical lamps illuminate the paper from the same distance, we see the paper twice as bright.

Instructions for conducting the experiment
Light from three point light sources
Explain why, in such an experiment, the three beams do not converge on the flashlight, as they did when using a single LED lamp in the previous experiment.
The experiment speaks!

The following question is the first one the student can answer when doing the experiment. However, he may not realize it or want it, for example, if the matter is quite simple, then perhaps there is no need for it. Sometimes this is not the case, and sometimes you could just check your own thinking. The following experiment can be set up quite easily.

What image would we see if we placed three slits in the light of three LED lamps. Make a drawing and put on it the rays of light that are important for explaining the result of the experiment.
If we raise the flashlight to one side and screen the light of three vertically arranged LED lamps in a single-slit experiment, we see only one beam on the paper. Explain this phenomenon.
What to say about it?

Let's keep the result in mind and start working on big light sources!