Mitsubishi Montero on 1996 System Problem

The truck starts, but does not work a coil that generates the spark for cylinders 3 and 6. I am interested in knowing the causes that could generate this type of problem. In advance, thank you very much for the support.

First, check the ignition coil by replacing it with another one, for example, a 1-4, and see if the same cylinder misfires. If it does, then check the wires and spark plugs, and finally, check the signal to see if the coil is firing. Depending on that, you'll need to test and do something about it, but to begin with, it looks like it's just the coil and nothing else.