4. A prospective borrower's debt-to-income ratio is the percent of his/her monthly income that is already committed personal debt. Below are data for 12 recent applicants. D/I (X) 33.23 34.15 30.35 32.13 49.17 19.95 41.42 29.78 54.63 25.55 36.38 37.43 (a) Sketch a modified boxplot of the data. Are there any potential outliers? If so, which value(s)? (b) What is the IQR for debt-to-income ratios? (c) What is the z-score for the applicant who had a debt-to-income ratio of 29.78%? Interpret this result. 5. A machine used in the production of a frozen pizza is designed to cut balls of dough according to a bell-shaped cur with a mean of 10 ounces and a standard deviation of 0.15 ounces. (a) What percent of dough balls weigh less than 9.70 ounces? (b) What percent of dough balls weigh between 9.55 oz and 10.30 oz? (c) What is the cutoff for the heaviest 0.15%% at dough balls