How do I construct 95% confidence intervals for this question?

Question

An article regarding interracial dating and marriage recently appeared in a newspaper. Of the 1704 randomly selected adults, 307 identified themselves as Latinos, 322 identified themselves as blacks, 255 identified themselves as Asians, and 776 identified themselves as whites. Among Asians, 79% would welcome a white person into their families, 71% would welcome a Latino, and 66% would welcome a black person.

I need help with constructing the 95% confidence intervals for the three Asian responses: (white, Latino, black).

Answer 1

sample proportion (phat) = 0.79 (white), 0.71 (Latino) and 0.69 (black)

sample size n = number of Asians = 255

z * = critical z value for 95% CI = 1.96

CI = phat +/- z-critical * sqrt(phat*(1-pht)/n)

plug in values for phat, n and z* to get 3 95% CI.