I need help understanding this.

A website reports that 50% of their users are from outside the United States and that 50% of their users log on to their website every day. Suppose that 40% of their users are United States users who log on every day. Complete parts a through e below. a) What percentage of the website's users are from the United States? The percentage of the website's users that are from the United States is 50%. b) What type of probability is the 40% mentioned above? personal probability empirical probability O marginal probability joint probability c) Construct a contingency table showing all the joint and marginal probabilities. Assign user from the United States and users from outside the United States to the columns. Assign users who log on every day user and users who do not log on every day to the rows. United Not United Total States States Log on every day Do not log on every day Total (Do not round.)