Consider the middle interval in the sampling distribution

Consider the middle interval in the sampling distribution of ii: (in = 0.83. in = 0.89). where 5 is the
proportion obtained from random samples of individuals 25 years or older in a Midwestern state who
have a high school diploma. Given an error probability of 5 percent. what is the sample size in this
sampling distribution?
a) 514
b) 545
c) 590
d) 604