5. Profitability Analysis Use the following cost information to assess the profitability of using logistic regression to determine which customers will receive a specific offer: Cost to mail offer to customer: Selling price (shipping included): Wholesale price paid by BookBinders: Shipping costs: $.50 $18.00 $9.00 $3.00 a) Create a new variable (call it MAIL) with a value of 1 if the customer's predicted probability is .083 or greater, and 0 otherwise. Since the breakeven response rate is 8.3%, this variable will be used to determine who gets mailed the offer and who doesn't. b) Generate a report summarizing the number of customers, the number of buyers of "Art History of Florence' and the response rate to the offer by the MAIL variable. c) What would the gross profit (in dollars, and also as a percentage of gross sales) and the return on marketing expenditures have been if BookBinders had mailed the offer to buy "The Art History of Florence" only to customers with a predicted probability of buying of 8.3% or greater?