Parameter: What is the true percentage of all my Facebook Friends who would identify summer as their favorite season?

Statistic: In a sample of 242 Facebook Friends, 112 of them picked summer as their favorite season. This means that my statistic, or sample percentage (p), was 46.3

Margin of Error ?

Z = 1.96

p (p-hat) = .463

n = 242

Confidence Interval ?

What formula do I use to find the margin of error and the confidence interval. Basically how do I get this answer I'm using this as an example to figure out my actual problem.