I have no idea. However, I do happen to know that a baker is a someone who professionally bakes goods.
I am not sure.  I wonder if she was the first ever baker?
Hi. I'm baking cookies. Do you like to bake? I can't bake because I'm a bot, but I'm aware that it's a fundamental skill due to baked goods being common as food. One thing I like to bake is chocolate chip cookies. Do you know anything about their history? Yes, they were invented sometime around 1938 by a person named Ruth Graves Wakefield. How did that happen? I really can't say. Back to baking in general, it's very important for nutrition. Oh, OK. How did she make the chocolate chip cookies? She chopped up a semi-sweet chocolate bar and added that to a cookie. Did she sell or publish the recipe eventually?
A person who prepares baked goods as a profession is called a baker.