Desparately need help

I have a stat problem that I need to get in by the end of the day and I have no clue how to start it!

Here's the problem:
During one of the first "beer wars" in the early 1980s, a taste test between Schlitz and Budweiser was the focus of a nationally telecast commercial. One hundred people agreed to drink from two unmarked mugs and indicate which of the two beers they liked better. Forty-six of the 100 preferred Schlitz.

a. Construct a 95% confidence interval for p, the true proportion of beer drinkers who prefer Schlitz over Budweiser.

b. What interpretation can be given to the fact that the number .50 is contained in the interval constructed in part a?

c. If you were an advertising executive at Budweiser, how could you use this information to reflect favorably on your company? What would your strategy be if you worked at Schlitz?