The table shows the political affiliations of U.S. voters and their positions on supporting stronger immigration enforcement.

a) What's the probability that
i) A randomly chosen voter favors stronger immigration enforcement?
ii) A Republican favors stronger enforcement?
iii) A voter who favors stronger enforcement is a Democrat?
b) A candidate thinks she has a good chance of gaining the votes of anyone who is a Republican or in favor of stronger enforcement of immigration policy. What proportion of voters is that?