We want you to learn from this text. Hence, we ask questions to ``push'' your thinking, and leave blanks in examples to ensure you are following along. We encourage you to {{CMD_7}}keep a notebook{{CMD_8}} where you write each question and your answers, along with each major theorem and example. In essence we want you to imagine that {{CMD_9}}we are writing mathematics together{{CMD_10}}, and thus are exploring a new world of mathematics together.