14. You are the controller for a restaurant chain. Cine day two chefs appear at your door. They arguing about toast; one says the other makes his toast too dark. They know you have take course and ask you to tell them how to determine customers\" toast preferences. You tell th about 100 customers. They return in a few days and tell you they sampled 92 random cust found 13 liked their toast \"yeny dark". {a} What is your point estimate of the proportion of customers who like their toast \"yery d {b] What is a 915% confidence interval estimate ofthe true proportion of customers who li "very dark\"? {c} What do you need to check to ensure your method is accurate? {d] How many customers would you tell them to sample if they 1want to he 95% certain th estimate is accurate to within 2%