An evaluator wants to determine the proportion of parents, p, who participate in musical activities (e.g., listening to music, discussing music) with their children at home at least once per week as part of an evaluation of a weekly preschool music program. The evaluator obtains a list of N = 500 parents whose children participate in the weekly music program. Determine the number of parents who need to be surveyed to estimate p with a bound on the error of estimation of B = 0.05. Assume that the evaluator has no prior information available to estimate p.