I need help solving this, please.

The following contingency table shows opinion about global warming (nonissue vs. serious concern) among registered voters, broken down by political party affiliation (Democratic, Republican, and Independent). Use the table to answer a) through c) below. Opinions on Global Warming Nonissue Serious Concern Total Democratic 80 420 500 Political Party Republican 260 240 500 Independent 100 100 200 Total 440 760 1200 a) What is the probability that a randomly selected registered voter who is a Republican believes that global warming is a serious issue? (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.) c) What is P(Serious Concern|Democratic)? P(Serious Concern|Democratic) = (Round to three decimal places as needed.)