Suppose that Cobb County is going to build a new public park. Construction of the park will cost $ 15 million. The county plans to raise $10 million through the sell of municipal bonds and $5 million through an increase in property taxes. Suppose the county issues a $10 million, 10-year municipal bond at a 6% coupon rate to pay for the municipal bonds. If Cobb County's net assessed value of property is $1.5 billion, how much must the millage rate be increased to raise the funds to pay for the park? 4.24 mills 0.91 mills 3.33 mills 7.12 mills