A vitamin company has developed a new diet program intended to help customers to lose weight. Before marketing the diet program, the company would like to get an estimate of the population proportion of users of this diet program who actually lose weight. They decide to select a random sample of 120 customers with weight control problems and determine the proportion who successfully lose weight.If 90 of the 120 customers indeed lost weight, determine a 95% confidence interval for the population proportion of users of this diet program who will lose weight.