The following contingency table shows opinion about global warming nonissue vs serious concem among registered voters broken down by political party affiliation Democratic Repul Independent Use the table to answer a through c below Opinions on Global Warming Nonissue Serious Concern Total Democratic Political Party Republican Independent Total 70 260 70 400 430 240 130 800 500 500 200 1200 O www a What is the probability that a randomly selected registered voter who is a Republican believes that global warming is a serious issue 480 Round to three decimal places as needed b What is the probability that a randomly selected registered voter is a Republican given that he or she believes global warming is a serious issue Round to three decimal places as needed