Explain the results for the taste sensations in each of the regions of your tongue

 Coke - Sweet - Front tip of tongue- Slightly sour - Sides of tongue
 Lime juice - Sour - Sides of tongue - Bitter - Back of tongue
 Coffee - Bitter - Back of tongue - Slightly bitter/slightly sour -Back and sides of tongue
 Pickle Juice - Salty - Sides of tongue - Slightly bitter - back of tongue
Hope this is what you need