Two burners wont ignite

Question

so two of the burners won't ignite, and they're both on the right side.there is gas coming out of all of them, (there are 5 burners).i can light all of them with a match,and i can light the ones on the left, and the one on the middle with the spark.there doesn't appear to be a spark on the burners to the right.i've cleaned all the holes with a pin.its a whirlpool GHH95 kitchen cooktop, i got about 5 years ago.whenever i try to light a burner, only the burners in the middle and the left hand side spark.