On April 2, 1998, an engineer bought a $1000 bond of an American airline for $875. The bond paid 6% on its principal amount of $1000, half in each of its April 1 and October 1 semiannual payments;it repaid the $1000 principal sum on October 1, 2011. What nominal rate of return did the engineer receive from the bond if he held it to its maturity (on October 1, 2011)?