I have to disagree with virolino's answer. The phrase "ask and answer" is deliberately ambiguous. It's not explicitly stated who you are asking, and where the answers come from. Because this is a textbook, the entire point of the exercise is to learn how to ask the right questions, and find the answers to those questions.
You might ask yourself, and find the answers within. Or you might ask others, and get the answers from them. Or, you might figuratively ask the question by searching online or printed references, and get the answers that way. It doesn't matter, as long as you learn to enjoy the spirit of inquiry.
As with any language, sometimes the intended meaning of a sentence is not the same as the way you might first interpret it. We call this "reading between the lines", and it's an important part of becoming fluent in that language.