Melinda invests $100,000 in a City of Heflin bond that pays 3 percent interest. Alternatively, Melinda could have invested the $100,000 in a bond recently issued by Surething, Inc. that pays 4 percent interest with similar risk and other nontax characteristics to the City of Heflin bond. Assume Melindas marginal tax rate is 25 percent. What is her after-tax rate of return on the Surething, Inc. bond?