Vino de Luche has outstanding bonds that currently sell for $950, have a par value of $1,000, and have 15 years left to maturity. If the bonds carry an coupon rate of 12%, what annual yield to maturity do the bonds promise, given the following added conditions?

	The coupon interest is paid annually
	The coupon interest is paid semi-annually
	The coupon interest is paid quarterly
	The coupon interest rate is paid monthly