Likewise means you are comparing two things. It means that they are alike in a way such as, the apple was red, likewise, the strawberry shared a similar shade. :D
If google was not invented it would be much harder to learn things in general. Google might even be a necessity in our lives, For example if someone asked what was the most dangerous animal in the world, People in the 80's would refer to a book in the library because google wasn't available. I'm not to sure how this article would help you lol.
Try 4 it should be correct
Every tangible product is made out of physical matter, meaning it can be touched, smelled, or similar.