3. (6 points) Which of the following phenomena are attributable to overconfidence? Explain your assumptions if needed. (a) The tendency for people to think that they have very smart friends, but they are not so smart themselves. (b) The tendency to think that CEOs are geniuses. (c) While studying one particular portion of a course the night before a student thought, "It's okay man, I am sure no one understood this, so no one is getting this question". The following day, his best friend says she, and many of her other friends understood everything and starts explaining in detail. (d) The tendency to come early to meetings