Blanka Dobrynin is convinced that Wringley could borrow $$3$ billion at a credit rating

between BB and B and with an interest rate of about $13\%.$ However, a firm$$s cost of debt is

often hard to estimate and different analysts can consider alternative methods that can

generate a wide range of estimates. Produce your own estimates of Wringley$$s cost of debt

assuming that it borrows $$3$ billion. Overall, would you agree with Blanka Dobrynin that

Wringley should be able to raise such amount of debt at an interest rate of around $13\%?$