A study of tipping behaviors examined the relationship between the color of the shirt worn by the server and whether or not the customer left a tip.There were 418 male customers in the study; 40 of the 69 who were served by a server wearing a red shirt left a tip. Of the 349 who were served by a server wearing a different colored shirt, 130 left a tip. Find the relative risk of red-shirted to non-red-shirted and report your answer to two decimal places.